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Why is the motor of my FX series canister filter making a low, rumbling noise?
Noise originating from the motor suggests that the impeller assembly needs to be replaced. As the only moving part in your filter, the impeller does eventually wear and is, therefore, not covered under warranty.
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I have recently noticed decreased performance and increased maintenance frequency on my 06 series filter.
This usually indicates an increased load on your filter, due to either the growth of your fish, the recent introduction of additional fish, increased waste production (i.e. leftover food, excrement, etc.), or clogged filter media in need of replacement.
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I'm using a 06 series filter on my marine tank and noticed bursts of air coming from my filter output.
Air input into your system is most likely from the skimmer. Fine air bubbles are gathering in the canister filter and are being ejected in bursts. Consider adding a bubble trap in the sump.
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Why do my fish appear to gasp at the surface of my aquarium right after a water change?
During water changes the aquarium is usually filled to a higher level. This reduces surface agitation from the filter output nozzle, which has not yet been adjusted to provide surface movement and oxygen levels your fish have become accustomed to.
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Why do G series filter conductivity readings sometimes differ from those taken by a refractometer?
The Fluval G conductivity accuracy is rated at +/- 8%, so it is normal to see a difference. A marine tank will also usually have fine air bubbles floating about from the protein skimmer, resulting in a slightly larger differential.
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I replaced the impeller of my 06 series filter and noticed a small leak coming from the handle when shutting down.
The leak is most likely from the canister O-ring. Before you purchase a replacement, remove and clean it with warm water. Thoroughly wipe the receiving groove in the filter with a soft cloth. Finish with Fluval lubricant (#A325).
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I just purchased a 306 filter for my 50 gallon African Cichlid tank. Other than the supplied filter media, are there additional media needed for these types of fish?
Yes, Fluval Total Clear will crystallize the water and rapidly remove organics, providing better algae growth on rockwork that these fish love to graze on. Also consider adding a coarse pre-filter media at the bottom of the filter to support long term performance. See more
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My aquarium often suffers from high phosphate levels and algae problems. What can I do?
Prepare your water before adding it to the aquarium in separate, clean container and add Fluval Sea Phos Clear to lower phosphate levels. See more
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How do I know if my protein skimmer is working properly?
It usually takes about a week for a new skimmer to settle in. When adjusting your skimmer, start with the air input at maximum and slowly push the skimmer collection cup down until you see the type of skimmate desired. Be patient and allow for a day or two after each adjustment to evaluate. See more
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Why do the instructions for the G-series TRI-EX filter cartridge recommend to first lower the phosphate levels?
This is simply stated to help you get the best results and lifespan out of this resin. See more
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Does Fluval Bio Max support bacteria that converts nitrate, nitrite and ammonia?
Within the oxygen-rich environment of a Fluval canister filter, Bio Max will support and provide the ideal surface for autotrophic species of nitrifying bacteria to cultivate upon.
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How do I prevent my baby fish from being pulled into my canister filter?
You can use a rectangular foam filtration block by carefully carving out a cylinder from the center and sliding it over the filter strainer. You must rinse this temporary protective foam block regularly as it will accumulate debris rapidly and can slow the filter output down, potentially affecting oxygen levels in your aquarium. Caution is therefore strongly advised. You can use this method until the fry are large enough.
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My G series filter media cartridges sometimes drip water onto the LCD display when removed. Can this damage the unit?
We advise removing any water as soon as possible as the exterior screen has not been designed to be waterproof. See more
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What's the best combination of media for an 06 series filter with very messy fish?
For aquariums with species that are strong feeders and fairly messy in nature (i.e. digging habits), we recommend using Fluval Pre-filter rings at the bottom level, Fluval Bio-Max in the middle for the ultimate in chemical filtration and lastly, Fluval Sea Total Clear at the top.
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Would the PS1 Protein Skimmer remove surface film on a small freshwater aquarium?
No, a protein skimmer is designed for use in marine aquariums only. Stop the pump and remove the film with a small container a little at a time. Then apply a filter media with a good organic scavenging resin and high grade carbon, such as Fluval Sea Total Clear (effective in fresh and salt water). See more
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I have a Fluval 306 filter. How do I eliminate/prevent surface film on my larger 30 gallon aquarium?
The surface film is likely due to feeding fish food with a high fat content. We recommend the use of a surface skimmer, connected to the inlet of your Fluval 06 filter.
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I change the carbon in my 06 series filter bi-weekly. Is this too often if I have a small fish load?
No, it is better (and easier) to prevent odors versus having to remove them once they've accumulated. Some fish are messy eaters, or are more prone to producing large amounts of waste, so prevention is key.
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Why do I have trouble restarting my 06 series filter after cleaning it?
First, check your impeller and impeller shaft as it's possible either of these are damaged and need to be replaced. It's also possible the impeller cover may not have been re-attached correctly. Check these 2 items as the impeller is the only moving part.
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The lid on my 06 series filter won't close, and it leaks near the motor head clips (near the head & canister seam).
We recommend a thorough cleaning of the filter case O-ring and applying Fluval lubricant. It is normal after a few years that the O-ring can dry slightly, so if lubrication doesn't work it may be time to switch out the O-ring altogether.
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Why do the replacement foam media blocks sometimes vary in appearance from the ones I received with my 06 series filter?
Some production variation in this type of filter media is expected and normal. Oftentimes, replacement foams can be coarse, which not only effectively removes debris, but also supports better water flow and distribution to the rest of the filter media.
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What size sump pump is ideal for a 100 gallon reef tank with a 30 gallon sump to house filtration and other hardware?
Fluval offers several sump pump sizes, which are all certified for marine use and equipped with additional fittings to provide flexibility. We include an instruction manual link on each product page to help you determine the right pump for the flow rate you desire. Don't forget to accurately account for head height in your calculations. See more
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I just purchased an SP sump pump. Should I hard plumb my reef or go with flexible hosing?
Fluval pumps include various fittings that allow you to consider both options. For the average hobbyist, we usually recommend flexible hosing as it has a greater noise-dampening properties and requires less use of elbows and other fittings that can diminish pump output performance. It is also easier to replace, if necessary. See more
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Why is air entering my reef aquarium after setting up an SP sump pump?
There may be no bubble trap within the sump after the output of your skimmer. If not, we recommend installing one. Also, the pump inlet may be drawing air from the surface. If so, we recommend installing an elbow (of the same diameter as your pump inlet) and directing it towards the bottom of the sump.
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My aquarium system has 1.5" hard plumbing, but I noticed that Fluval sump pumps use 1.25" in and out. Will they fit?
This should not be a problem as adapters are readily available at various plumbing part retailers to hook up the Fluval pumps .
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What is the air output of the Q series of air pumps?
Kindly consult the instruction manual for product specifications. See more
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Why did my aquarium pH level rise rapidly after changing my gravel.
Some buffering by natural gravel is expected, but where it will have a more dramatic effect is on tap water with little buffering capacity; KH. A stable pH would require at least 30-40mg/L KH temporary hardness.
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I would like to cycle a new fishless aquarium by using decomposing food or ammonia. Can I use Fluval (Cycle) Biological Enhancer with this option?
Yes, however, we don't recommend either method. Ammonium chloride dosing usually results in excess ammonia concentrations, which prolongs the cycle and adds unnecessary pollution. If you already have a healthy aquarium, transfer some established filter media and dose with Fluval (Cycle) Biological Enhancer.
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How do the nitrifying bacteria in Fluval (Cycle) Biological Enhancer survive in a sealed container?
This bacteria has been conditioned to enter a dormancy phase prior to bottling that allows it to survive with minimal food and oxygen intake. It is activated very quickly after introduction to your aquarium.
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My new aquarium seems more cloudy than the day after it was set-up. Could it be due to my filter?
The issue may likely be a biological (bacterial) one and not related to the filter. We recommend using Fluval Bio Clear to naturally knock these bacteria out of the water column, as well as keeping fish stocking levels to a minimum while feeding sparingly until the tank has matured. See more
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Following a water change, why did my protein skimmer over-skim after applying (Aqua Plus) Water Conditioner?
It occurred due to the fish-protecting colloids in these products. Simply shut off your skimmer for a couple of hours to prevent this from happening in the future.
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I recently brought small jar of water from my aquarium to my local fish store for a pH check. Whey did my test kit show 7.0 while the store's kit read 7.6?
It is preferable to bring the test kit to the store to measure both kits at the same time. As the jar had air in it did change in pH. When transporting samples make sure there is no air in the container. Also note that the conditions can be different enough in two locations, as suggested, test with both kits in the same location, tests done at the same time.
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What are those small beige particles that float around my aquarium after applying (Cycle) Biological Enhancer?
These particles are called Bio Flocs, which help provide a safe environment for your fish. As per the product instructions, shake the bottle well before each use to include Bio Flocs with each dose.
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I just added Fluval (Aqua Plus) Water Conditioner to my new betta tank. Can I add betta fish right away?
It is always best to wait a day or two before adding bettas. This will give you time to condition the water properly, make sure all tank devices are working properly and ensure temperature is set correctly.
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Is Fluval (Aqua Plus) Water Conditioner amine-based? I am using a resin-based filter media that is sensitive to amines.
No, these products are not amine-based.
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I've been cycling my aquarium for several weeks and have a high level of nitrite. How can I eliminate it ?
We recommend a double dose of Fluval (Cycle) Biological Enhancer after having performed 50% water changes. At this stage, one or two 50% water changes should dilute the nitrite sufficiently to ensure the bacteria introduced keeps the nitrite level down. See more
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Why does my thermometer seem to be off by a degree or two?
Most mass-produced aquarium thermometers have an accuracy deviation of +/- 1-2 degrees. If the deviation range is higher, you may have a defective unit requiring replacement.
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My heater won't hold a temperature of 80°F (26.7°C) in my basement aquarium. Do I need to add more heating power?
Yes, if you wish to maintain 80°F in your aquarium, you will likely need more power, or begin by warming up the basement itself as ambient temperature is very important. The cooler the room is, the greater the energy requirement to increase the aquarium temperature.
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Why do you include the preservative Ethoxyquin in your Tropical Flakes fish food?
We included this preservative as our food line needs to maintain a shelf life of approx. 2.5 to 3 years. Studies have also shown that this ingredient, as it prevents rancidity of food, is shown to be beneficial vs. the potential negative effects associated with rancidity, with normal dosing protocols.
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Why do you recommend feeding fish 2 to 3 times per day when mine don't eat that much to begin with and are perfectly healthy?
Our feeding instructions are a general guideline due to all of the thousands of species that exist, many of which feed within different zones in the aquarium and may require different diets and time for consumption. At each meal, feed a small amount and let your fish consume that food before adding more. Repeat this process for a two minute period. See more
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Why do you recommend feeding fish without using your fingers?
Using the bottle cap method to feed fish will help control portions and prevent overfeeding, but also avoid fingers from coming into contact with the food (which can potentially contaminate it due to the bacteria, oils, creams, etc. often found on our hands). See more
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Is there a benefit to feeding Tropical Fish pellets to a community tank with various species?
Yes, Fluval sinking pellets will allow bottom feeders to feed adequately. The nutritional density is also higher, so it's actually easier to regulate feedings as you can more easily control quantity. Additionally, pellets are easier to feed accurately using automatic fish feeders.
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My young child ate your flake food. Is this dangerous?
Fluval fish foods are not meant for human consumption. That said, allergic reactions to various ingredients are a potential risk for any food, human grade or not. While being a safe food, we strongly recommend storing your fish food out of the reach of any young children.
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I feed Cichlid food on occasion to my community tank. Is this okay for Tetras and other tropical fish?
Fluval Cichlid foods are perfectly safe and are beneficial to feed to all tropical fish. This is our only formulation that contains earthworm meal, which represents a beneficial protein source that is easily digested.
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Should I throw out Vegetarian Flakes if they are not consumed by the expiry date indicated on the bottle?
The best before date is conservative. Only a couple of vitamins may be less present at that time, but you can feed off the balance of the food shortly thereafter. You should buy what your fish will consume within a maximum of 6 months.
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Why aren't my fish eating the Tropical Fish pellets as vigorously as the flakes I used to feed them?
You can expect a few days to a few weeks until some fish attack the food with the same vigor as they had flake food. We recommend your fish do become accustomed to pellets as well due to the improved function of an automatic feeder and the nutritional density of an extruded pellet vs. a flake.
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Does Fluval offer sinking tablets for bottom feeding fish?
Although there is no tablet format, Fluval Tropical Fish Pellets are a sinking pellet and are available in small- and medium-sized formats, which is perfect food for bottom feeders. In fact, by broadcasting a few pellets into your aquarium, you are achieving a better distribution of food, and thus making it more available to all the fish.
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What ingredient(s) in Fluval Color Enhancing flakes actually help enhance fish colors?
Fluval Color Enhancing Flakes include a high dose (25%) of Krill, which are very palatable and also have a natural color-enhancing effect on fish.
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Why do the Tropical Fish flakes break down easily?
Flake foods that are free of fillers and other low value ingredients tend to be delicate by nature. Fluval fish foods include over 60% high value proteins in all its formulas, making them highly palatable and devoured by all fish.
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I purchased floating pellets for my betta to vary his diet. Do you have other tips on betta care?
You can further vary your betta's diet with frozen shrimp, frozen glassworms, frozen bloodworms and color enhancing flakes. In fact, Fluval Color Enhancing Flakes include 25% krill, an excellent palatability enhancer that also dramatically improves fish colors.
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Why are Fluval pellet fish foods all the sinking kind?
Fluval pellet foods sink because it is the most effective way to feed all fish. Surface feeders have plenty of opportunity to feed on the pellets as they fall, while bottom feeders are better able to feed on those that sink all the way down.
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My barbs and danios seem to charge the glass even after feeding for minutes. Should I feed them more?
No, for active species like barbs and danios, feeding them a little less per feeding and adding feeding periods during the day is preferable. Feed them three times a day and observe their stomachs. Slightly full looking is sufficient.
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I added colored gravel to my tank, having rinsed and stirred it beforehand, but my water is still tinted.
When rinsing any epoxy-coated colored gravel, use lukewarm to cool water and stir gently. If you use water that is too hot and/or mix too vigorously, this can remove the protective coating and potentially allow the color to leach into the water.
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I recently set up a tank with Mopani driftwood. Why is the water now stained dark?
Before using Mopani or any natural driftwood, Fluval strongly recommends pre-soaking it for at least a few days and changing the water regularly. After doing that and placing it in the aquarium, you should apply Fluval Sea Total Clear to effectively clear and remove any discoloration. See more
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Why do some Mopani wood pieces float and others sink?
Not all pieces will sink right away, or at all. This is a natural product and, as such, there can be variations from one piece to another. Fluval suggests pre-soaking the wood in a clean bucket for about a week, while changing the water once to twice daily. Some pieces may need to be weighed down for the first couple of weeks.
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Why does Fluval natural gravel vary in diameter and color from one bag to another?
Gravel and rocks are raw substances that naturally vary and are impossible to replicate. We recommend mixing two or more bags into your aquarium to add a homogeneous look to the substrate.
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Do I really need 3 inches of gravel depth at the back of my new tank to create a slope effect?
No, two inches should be more than enough to create a decent slope from rear to front (the front should have approximately 1 inch of gravel). Higher gravel at the rear of a tank is called for when keeping live plants, which grow tall and typically have a strong root network.
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After adding Fluval natural gravel to my soft water tank, the pH level spiked (from 6.3 to 7.4). Should I remove the gravel?
Due to the low KH value of your soft water, the gravel in question increased the buffering capacity of your water (KH) and, therefore, the pH value as well. Keep an eye on your fish and perform a few extra water changes while using a product to help lower pH if necessary. They will adapt to this pH and, in fact, it will be far more stable from now on.
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How do I get rid of visible waste on the live rock in my reef tank when performing water changes?
Install a polyester aquarium filter pad or floss, then direct the current of your circulation pump near the bottom to flow over the rocks and coral. This should help liberate and trap most of the waste. After an hour or two, remove the filter pad and perform a water change.
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Why am I having a hard time starting my Fluval gravel vacuum?
Submerse the gravel tube and flexible hosing in the aquarium, allowing all the air to escape. Plug the free end of the flexible tubing with your thumb, then quickly take that end and place it over a bucket nearby. Release your thumb and gravity will take over, allowing the siphon to start. You may now complete your gravel washing while doing your water change.
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Are there any issues performing a weekly 20% water change in a heavily-stocked African cichlid tank?
No, frequent water changes are called for when keeping aquariums with high stocking densities. Make sure the replacement water is of the right temperature and conditioned with Fluval (Aqua Plus) Water Conditioner. See more
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Why has the output on my new CO2 set diminished even after changing cylinders?
We advise you to replace the diffuser as the ceramic disc has a life expectancy of 3-6 months. The replacement disc can be easily ordered. See more
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What bubble count should I factor when using the Fluval 88 CO2 system?
To maximize the lifespan of your CO2 cylinder, we suggest a bubble count of approximately one bubble every 4-5 seconds. This should deliver adequate CO2 in moderately planted tanks.
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I installed a Fluval 88 CO2 system a few days ago and one of the cylinders is already empty. Is this normal?
No, at a few bubbles per second, the canister should last approximately 1-2 weeks. It is possible some CO2 escaped while adjusting the unit or attaching the CO2 cylinder. Verify if the regulator is leaking at the cylinder connection. It may simply require further tightening. To inspect for possible leaks at the gauge connection, remove the unit and apply soapy water to the connections, allowing you to see if any bubbles are being produced.
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How many hours a day should I leave my aquarium lights on if I have live plants?
The typical photoperiod for live plants is 10 to 12 hours, however, keep in mind that different species of plants have different light level requirements. Typically, 1 watt per gallon is recommended for lower light level plants, 2 watts per gallon is ideal for mid lighting level plants and 3 watts per gallon is preferred for plants requiring higher light levels.
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Does Fluval carbon and zeolite filter media remove the liquid plant fertilizer I apply to my aquarium?
Zeolite is not a problem. Carbon, especially when new, can remove some trace elements present in many liquid plant supplements. We recommend waiting at least a week or two after having changed the carbon before you apply a liquid plant supplement.
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What is the pressure at the regulator of a Fluval 88 CO2 system?
The pressure of a CO2 cylinder is totally dependent on temperature. The relationship between the liquid CO2 and vapor pressure is logarithmic, so keeping cylinder temperature at a maximum of 80°F is very important. At 72°F, the vapor pressure is 860 psi. At 80°F the vapor pressure is 970 psi.
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I am starting to inject CO2 into my planted tank. Should I remove carbon from my filter?
Yes, activated carbon can remove trapped gasses, of which carbon dioxide could be one, so carbon removal is recommended.
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I hear a lot about PAR values in lighting. Is it really that important?
PAR is a measure of light energy present within the visible light spectrum. If you don't have the required spectrum for your application, however, this lighting power is certainly less important. To make PAR more relevant, try to understand the PAR value that the animal or plant has grown under, and match that value. Spectrum is still the single most important specification, encompassing at least half of everything you have to consider when evaluating light. See more
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Why do some of the LEDs on my Marine & Reef LED appear to not be working?
The LEDs you perceive as not working are, in fact, emitting light at a wavelength of 400nm, which is barely visible to the human eye.
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Could I connect a basic mechanical timer to my Fresh & Plant or Marine & Reef LED?
Yes, this is possible.
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I am currently using a double 20W light fixture and thinking of switching to a Fluval Fresh & Plant 25W LED. Will this provide sufficient lighting for my plants?
Plants will adapt to changes in lighting, but do so slowly. If you are now providing 40W of power and change this to 25W, it may effect plant growth if the lights are of the same color temperature. It also depends on the type of plants. Plants requiring low to mid level lighting may take the drop in output better than higher light level plants.
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How do I remove any algae that may be accumulating on the frosted inside area of my M-series reef aquarium?
Whether it is seen or not, algae removal needs to be a regular weekly maintenance task. This is performed simply by going over the inner glass surface with an aquarium magnet or pad. Algae accumulations, on the other hand, are always more difficult to address. In those cases, empty the tank and use a proper scrub pad and vinegar to help remove the algae, rinsing with freshwater before reusing. The frosted etching on the M-series reef tanks appears on the outer surface only.
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What live plant species do you recommend for the Spec aquarium?
The LED lighting supplied with the Spec is suited for plants requiring a lower light level. This includes some cryptocoryne species, java fern and anubias nana.
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Is it possible to grow live plants in the Chi aquarium?
By design, it is not possible to implement adequate lighting for live plants in the Chi. We strongly recommend only keeping Chi decor ornaments and Chi synthetic plants inside this aquarium.
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Is it possible to grow live plants in the Edge (6 gallon) aquarium?
While Fluval already offers a full range of Edge-specific decor pieces, it is possible to grow plants requiring low light levels successfully in this aquarium. Species such as anubias, java fern and some cryptocorynes are ideal choices.
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I have an M-Series Reef aquarium that has been running for a couple of months now with cured rock. Can I now add coral frags?
Yes, but only if you have measured all key parameters (i.e. ammonia, nitrite, nitrate, phosphate, calcium, alkalinity) and the results are favorable. Make sure you include a few snails and blue leg hermits to help deal with any potential algae you may experience.
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Could I modify my Edge aquarium?
We recommend avoiding modifications of any kind as they can void the product warranty.
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I recently purchased the Spec 5 aquarium. Do you have the PAR and color temperature specs for the lighting system?
Due to the nature of this type of aquarium, these lighting specifications are not provided at this time.
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What tips can you offer new hobbyists?
Consult our vast library of helpful articles and videos, for both new and experienced hobbyists. See more
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My salt mixing buckets have beige-colored deposits on the sides.
This is likely attributed to using tap water or high alkaline water, which can cause some precipitation when mixing with salt. It is not a problem attributed to the salt, unless you see waste material or discoloration within the salt itself.
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I just boosted my aquarium's alkalinity level and the water turned cloudy. Is the alkalinity supplement defective?
When dosing with alkalinity supplements, you must know the calcium level as well. If your calcium level is much too high (or vice versa) versus the alkalinity level, you will create precipitation, which can look like cloudy water. Always calculate net volume of your tank. With larger loads of live rock in a reef tank, deduct 20% when dosing alkalinity as a starting point, then adjust by testing and verifying the resulting KH value.
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After adding salt to my reef aquarium, the specific gravity reading from my hydrometer was very high. What should I do?
Make sure you tap the hydrometer thoroughly to dislodge any air bubbles from the armature. If tapping doesn't help, insert a thin object in the hydrometer and tap the armature directly to release any lodged bubbles.
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How do I control nitrate and phosphate in a saltwater tank?
Fluval SEA offers a full range of marine supplements that will help control these compounds. If you have a Fluval M-series reef tank, you can also use the rear compartments as a refugium for algae. Cheatomorpha algae, for example, can grow abundantly when provided with strong lighting and help eliminate these unwanted compounds naturally. See more
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Do you have any maintenance tips for the Fluval M-series reef aquariums?
Yes, check out our video on the M-series aquarium. See more
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Why is my FX canister filter emitting bursts of fine air bubbles on my saltwater aquarium?
This happens often with most canister filters set-up on marine aquariums. It is usually due to the fine air bubbles introduced by protein skimmers. Make sure you employ an effective bubble trap at the skimmer output or within the sump.
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Do LPS corals in my Fluval M-series reef aquarium require strong water movement?
Some LPS do. We suggest consulting a reputable marine specialty retailer to confirm the ideal conditions your coral species require. You can also add a Fluval Sea CP circulation pump if you need additional water movement in your tank. See more
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Is the strip lighting provided with M-series reef tanks ideal for acroporas or other SPS coral?
For SPS coral, we suggest adding a Fluval CP circulation pump as well as an additional Fluval Marine & Reef LED. You will need to buffer the alkalinity level more frequently for those types of corals. Water testing and regular water changes will also help in maintaining SPS coral.
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What material is Fluval Activated Carbon made from?
Fluval Carbon is made from bituminous coal, which is the best overall source material for carbon used for aquarium water filtration due to its varying pore structure and sizing.
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What is the filter output performance for the Fluval 406 canister filter at 2 feet and 4 feet of head height?
The 06 series of canister filters is a closed re-circulation filter system, and as such head height has no real impact on performance. Length of tubing and filter media are factors in filter output performance. We recommend never exceeding the specified vertical distance in the instruction manual as this will cause the filter to exceed the maximum head pressure value, which could cause the filter to leak and fail.
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Do your Fluval SEA marine supplements have a specific shelf life?
Yes, there are specific expiry dates depending on the product. Iodine, for example, has a 2-year shelf life, and Trace Elements, Strontium and 3-Ions have a 3-year shelf life. Check the back of the label for the best before date.
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At what temperature is the Fluval SEA Hydrometer calibrated?
The Hydrometer is calibrated to 75°F.
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I just started using Fluval SEA Marine Salt, and I noticed my pH is 8.1 to 8.2 after a few minutes of mixing. I use RO water and the water is clear after that short mixing time. Can I use the resulting marine mix within the first 10 minutes?
Yes, you can. Fluval SEA Marine Salt mixes clear in the first few mintues, and should give you a safe stable pH of 8.1 to 8.2.
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I purchased my Fluval SEA Marine & Reef Performance LED about two months ago, and it appears dimmer now. Isn't LED lighting supposed to last longer?
It is likely that your lens has some accumulation from your open marine aquarium that may be significantly blocking the light being produced. Try the Fluval Lens Cleaning Kit on a weekly basis to ensure you are keeping the lighting levels consistent and sustaining the conditions for coral growth. See more
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I would like to increase the lighting for my new Fluval 45 Bow Front Premium Aquarium kit. Could I use the canopy that came with the kit, or do I have to purchase a new lighting system?
You could add a second LED light strip complete with transformer that would fit into the canopy that came with your kit. It can be purchased as a spare part at your local retailer. See more
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I purchased the Fluval Fresh & Plant Performance LED, but feel the light is too strong. What do you suggest to reduce the light output since it the light does not work with a dimmer.
You have a couple of options for reducing the light entering your aquarium. You can purchase a Fluval Performance LED Cable Suspension Kit, which will allow you to suspend the light over your aquarium, effectively reducing the intensity of incoming light. Floating plants are also a great way to naturally diffuse light entering the aquarium. Moreover, they help purify the water at the same time and they provide a more natural habitat for many shy species of fish. See more
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I recently purchased the Fluval M40 Reef Aquarium and Cabinet Set, and I would like to know if I could keep a a pair of maroon clowns in this tank?
It is possible while the clowns are still young, but they will eventually outgrow the aquarium. We recommend you consider instead perculas, occelaris or skunk clowns as they do not grow as large and are more peaceful.
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I am having trouble maintaining a connection to the app. What should I do?
1- Close the app;
2- Shut your mobile device off;
3- Unplug the Wifi module from the power source for 5 minutes;
4- Plug the module back in and wait 2 minutes;
5- Turn your device on and open the app.

If you are still having trouble with the connection, delete the app from your device and re-install it. Follow steps 1 through 5 again.
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I am having trouble downloading the Wifi app on my iPad. Am I doing something wrong?
Change the setting to iPhone in the app store to download the app on an iPad device.
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Why does my light go dim and then go bright throughout the schedule?
The cloud effect has been engaged. If this effect is not desired, simply unselect it through the settings tab.
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I have 2 Wifi modules operating 4 Fluval 2.0 LED lights on my aquarium. I noticed that the time schedules and light intensity have been irregular. Is something wrong?
Two or more Wifi modules must be a minimum of 20 inches (50 cm) apart as they can interfere with each other. We recommend you locate the two controllers to a minimum of this distance.
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Time display of my Wifi module is in military format. Can this be changed?
At the present time, no. We are working on adding this feature soon.
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Does the Wifi module re-set the time and settings in the event of a power failure?
Settings will not be affected; however, the time is pulled from your mobile device. Make sure time is correct on device in order to maintain schedule.
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Which devices are compatible with the Fluval app?
Refer to the Tested Devices Page in the Instruction Manual (Compatibility likely applies to more devices than are currently present on this list).
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Why are the lights of my aquarium flickering?
If the light tubes are over 12 months old and they have gone black at the ends, they will need to be replaced.
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Why has your algae magnet scratched the glass in my aquarium?
The algae magnet would not scratch the glass. The scratch may have been caused by sand or fine substrate that has been trapped between the magnet and glass.
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Why has my U3 filter stopped/broken after maintenance?
The impeller magnet can become covered with an expected bio-film. Detach the motor, pull out the impeller, and clean the attached magnet and well.
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Why can't I get bubbles from the spray bar or bottom outlet of my U filter?
The venturi air valve will only operate on the top outlet of the filter.
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Why has the U filter trapped and killed my fish?
The filter will not trap and kill fish. Fish will hide there if stressed or unwell, and be drawn towards it if they die.
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Why is my E heater not reaching the desired temperature?
This is usually caused by the heater not being fully submerged and in some cases losing heat through the plastic casing at the top. It is also the case when the ambient temperature is much colder than your aquarium target temperature. More heating power is called for in this case.
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Your instruction manual for the E heater says it is not fully submersible.
The manual specifies a minimum water level, not maximum. E heaters are fully submersible.
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Why does my E heater sometimes flash blue in the morning?
This is due to the fact that the water temperature has dropped by one or two degrees overnight. When the aquarium lights are turned off, the heat disperses from the water quicker.