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Fluval

Fluval FX6 High Performance Aquarium Filter, Canister Filter for Aquariums up to 400 Gal.

  • Based on 5,928 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives May 13 – May 14
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Size: Fx6


Features

  • Multi-stage filter pumps out 925 US Gal (3,500 L) of water per hour, Smart Pump advanced microchip technology continuously monitors and optimizes pump performance
  • Self-starting just add water, plug in and Smart Pump will take over, trapped air auto-evacuated every 12 hours to ensure maximum efficiency
  • Easy water changes eliminate need to lift heavy buckets. Simply attach hosing to output and Smart Pump does the rest
  • Removable, stackable media baskets eliminate water bypass and hold a total of 1.5 US Gal (5.9 L) of media, all filter media included - mechanical, chemical and biological
  • Compact 21 in (53 cm) tall design - easily fits under most aquariums

Description

Fluval FX6 is a high performance canister filter with many outstanding features designed to make aquarium fish keeping easier and more convenient than ever. This super capacity yet compact canister filter has a pump output of 925 gallons of water and has a filter circulation of 563 GPH, which both work to produce cleaner and healthier results. Filtering material can easily be placed in a removable stack of media baskets, which is at the heart of Fluval's multistage filtration. The baskets are precision-engineered to eliminate water by-pass, making filtration more efficient. The baskets can hold a total of 1.5 gallons of media and can be stacked in the precise combination of layers that will work best for your aquarium. Each one is lined with a foam insert for effective mechanical pre-filtering. Instant-release T-handles let you lift and separate the baskets quickly and easily, making routine maintenance simple. FX6 also features Smart Pump Technology, which provides optimum filter performance. This advanced technological feature employs an electronic circuit board that continuously monitors the pump. Impeller speed and force are constantly measured to ensure power output and energy efficiency. It also manages the filter's self-starting feature and evacuates air that may enter or build up within the filtration system. On a 12-hour cycle, the pump will pause and allow trapped air to escape, ensuring the best filtration efficiency. Only 21" in height, FX6 fits under most aquariums. Fluval first broke onto the aquatic scene in 1975 by introducing the world’s first 3-stage filter with synchronous motor technology. Since then, Fluval has built a legacy around this pioneering spirit, relentlessly adapting in a changing world to launch innovative aquarium products. Fluval’s mission is not just about building products that mimic the natural world, but inspiring aquarists of all skill levels to enjoy and respect the hobby for generations to come.

Brand: Fluval


Color: Black


Material: Rubber


Style: FX6 Filter


Power Source: Corded Electric


Item Weight: 19.9 Pounds


Maximum Flow Rate: 3500 Liters Per Hour


Global Trade Identification Number: 93


Number of Packs: 1


Manufacturer: Rolf C. Hagen (USA) Corp.


Is Discontinued By Manufacturer ‏ : ‎ No


Language ‏ : ‎ English


Product Dimensions ‏ : ‎ 15.1 x 15.6 x 20.7 inches; 19.9 Pounds


Item model number ‏ : ‎ A219


Date First Available ‏ : ‎ May 14, 2013


Manufacturer ‏ : ‎ Rolf C. Hagen (USA) Corp.


Best Sellers Rank: #10,074 in Pet Supplies (See Top 100 in Pet Supplies) #26 in Aquarium Filters


#26 in Aquarium Filters:


Customer Reviews: 4.5 4.5 out of 5 stars (6,209)


Power Source: Corded Electric


Flow Rate: 3500 Liters Per Hour


Color: Black


Product Style: FX6 Filter


Item Weight: 19.9 Pounds


Material Type: Rubber


Brand Name: Fluval


Model Number: A219


Global Trade Identification Number: 93


Manufacturer: Rolf C. Hagen (USA) Corp.


UPC: 015561102193


Manufacturer Warranty Description: 3 YEAR LIMITED WARRANTY


Specific Uses For Product: Indoor


Manufacturer Part Number: A219


Item Type Name: Fluval FX6 High Performance Canister Filter


Unit Count: 1 Count


Included Components: Product in Descripton


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: May 13 – May 14

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Simply the best filter on the market.
Size: Fx6
The Fluval FX line of filters is a real work horse which rarely goes wrong if you do the upkeep on it. I use one on the tank I have my turtle in, and it keeps the water crystal clear, even though the old boy digs a lot an tries everything he can to cloud up the water. If I take it off line for cleaning (which is a breeze) or maintenance, it will get the water clear again within an hour if the turtle has been very active while it was off, and much sooner if he wasn't moving around too much. He's a very active turtle, and a very messy eater, but he's neither active enough nor messy enough to overwhelm the FX-6. I also use an FX-6 on my hillstream tank which requires a lot of flow. It pushes the water through at a very good clip so that the stream has a pretty good current for my hillstream loaches and for my rainbow shiners to run in when they're getting ready to spawn. I have the FX-4 on a 20 gallon tank which is probably just a bit overpopulated, But again, it is a good enough filter that it keeps the water quite clean. With surface skimmers on my tanks, even the water's surface is clear. To clean the filter media, all you need to do is lift the media baskets out, the use the filter's bucket to clean the sponges and reusable media, replace the media which has broken down too much to be reused, or which uses chemical treating, then either empty the old water out and replace it with fresh clean, or keep the old water if it's not too bad (it is almost always too bad). The reason you clean the media in the water the filter bucket has in it is so that you don't loose any of the beneficial bacteria which is growing in it. The FX series of filters have variable flow valves, which is a nice feature, though many filters have that. If you close the valves before opening the lid of the filter, you don't have to worry about draining the hoses, and they will be good to go when you turn the filter back on and open the valves. No priming needed. Everything in this filter is easily repairable if something goes wrong. If something happens which wears out the impeller, it's very easy to take the old impeller out, and drop a new one in. It's also easy to replace all the O-rings when they get old and start to loose their ability to seal the unit. If you're unlucky, you might need to do that once a year, but it's more likely that you'll just need put new lubricant on them. I am mechanically challenged, so if I find it easy to take care of, I'm sure just about anyone will be able to do it. I have had problems with several of the other big brands of filter makers, but I have never had a Fluval FX series filter go south on me. I recommend them to anyone who wants to keep their fish's environment clean and healthy. If I ever start another tank, I'll definitely be buying another Fluval FX. ... show more
Reviewed in the United States on October 24, 2024 by K. Porterfield
    • Nice filter and meets the need
Size: Fx2
Great filter, powerful, quiet, works great. Keeps my 75gal tank very clean. Fairly easy to clean
Reviewed in the United States on May 2, 2026 by aug2011
    • Got The fx4
Size: Fx4
I have kept fish for about 50 years. I have experimented with many aspects of the hobby, studied everything, and done trail and error. Now I just run one 150 gallon tank, but at times have had many. I also have out door ponds. What I know is that most crap you read from so called experts on the web are "crap". After 50 years the basics are the same. The equipment has improved. Most people have no clue as to what a filter can do or should do. Go to my forum at yardcraphome dot com and open the critters section. I hooked this fx4 in today. I have been running the older fx5 (new model is fx6) for years and consider it a good buy. The fx5 had some challenges as to leaks and easy to break clamps, but suspect/hope they improved with the fx6/fx4 update. The fx5 is very good, best filter I have owned. Flow rate is important, but also is volume. These fx6/fx4 are huge. If you just want flow, buy a circulation pump. What you want is the water to pass over lots of helpful things before returning to the tank. I use multiple filters for different things as that helps as to maintenance. . One (fx5) is mainly for biological which is by far the most important. Due to the great 900 gal output, have it hooked to a a Tetra Pond bio filter that they claim handles 4000gal (doubt that). That reduces flow rate, but the combination is over kill for biological in my tank. The two together are like a large, but closed sump filter which can hold lots of bio material. The now dead Fluval 300 (or something?) was for chemical and needed replacement. I looked at filters to replace it and almost went with the new Ehiem 600 (great filters), but in the end got the small brother of the large Fluval that is still working great after years. I decided on the fx4 as opposed to the fx6 due to the fact the volume was enough when just for chemical, and I don't want my tank to become a rushing river. One thing with these is adjusting flow rate is very easy so maybe should have gone with the fx6. I hooked it up today and the only problem was a leak at the input connection. I wrapped some Teflon tape and easy fix. I filled it with Chemi-pure (because I have used it for decades) and and Purigen (which is just an excellent product). The flow rate is not that much more and my fish friends are large fish. I don't think flow reduction will be needed. My opinion is that for many, the fx4/fx6 is a best buy. The down side is they are large. Large is also the good part, but maintenance must be done from time to time so keep that in mind. These are heavy. I have a small room with a sink where filters live and tubes pass through the wall, so easy for me. My 3rd filter is the Fluval G6 which is a joke. This would be good for a nerd type with a small tank with low fish levels. I only keep it hooked in for the mechanical cartridge (no where near as good as the older Magnums, but very easy to service). Mechanical filtration occurs with all filters and while nice, should not be the focus of your filter choices. ... show more
Reviewed in the United States on November 14, 2018 by Mr Dowd
    • Run, don't Walk. Get you one NOW
Size: Fx2
Review Image by Tammie Durham
Absolutely! Hands down the best canister filter out there. If you don't have one and you're waiting, stop, go get it now, you won't regret it. There is no noise. It's easy to install. The flow rate is superb. Water clarity is spectacular. You couldn't ask for anything better. Go get you one! What are you waiting for? ... show more
Reviewed in the United States on December 12, 2025 by Tammie Durham
    • BEST FILTER EVER!!!
Size: Fx6
We bought this canister filter for our aquatic turtle in Dec 2020 and it was the best investment ever!! It's quiet and works non stop cleaning her 100 gal tank! Woke up this morning to her tank looking horribly bad! The water, which is usually clear to clear with a slight green tint to it, was a dark muddy mess and we couldn't even see our 11 inch turtle, Crush! We thought our fantastic filter had conked out, but once we drained the water we could see what had happened... our silly girl had knocked the input tube apart and had caused a big air bubble in the filter, and subsequently the filter dumped a ton of muck back into her tank trying to fix the issue. So we did a cleaning of the tank and hooked the filter back up and everything is running smoothly & quietly just as it should!!! We love this filter... it just needs to be taken apart and cleaned every 6 months, witch we do like clockwork! We had tried other filters from our local pet store before getting the Fluval FX6 and they were all a waste of time and money! I can't recommend the Fluval FX6 enough! ... show more
Reviewed in the United States on March 20, 2026 by Darlenegrau1
    • I would order again.
Size: Fx4
Great unit, works great. Easy install.
Reviewed in the United States on March 12, 2026 by Dave Bobbitt

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