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

  • Based on 5,603 reviews
Condition: New
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Availability: In Stock.
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Arrives Wednesday, Apr 2
Order within 11 hours and 49 minutes
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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.

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 ‏ : ‎ February 23, 2013


Manufacturer ‏ : ‎ Rolf C. Hagen (USA) Corp.


Country of Origin ‏ : ‎ Italy


Best Sellers Rank: #6,490 in Pet Supplies (See Top 100 in Pet Supplies) #20 in Aquarium Filters


#20 in Aquarium Filters:


Item Weight: 19.9 pounds


Manufacturer: Rolf C. Hagen (USA) Corp.


Language: English


Country of Origin: Italy


Item model number: A219


Date First Available: February 23, 2013


Item Package Dimensions L x W x H: 20.5 x 15.62 x 15.31 inches


Item Dimensions LxWxH: 15.1 x 15.6 x 20.7 inches


Item Weight: 19.9 Pounds


Brand Name: Fluval


Target Audience Keyword: algae-eaters, bottom-feeder-fish, mollusks, goldfish, octopuses, snails, fish, cichlid-fish, sharks, rays, invertebrate-fish, betta-fish


Directions: See included instruction manual


Warranty Description: 3 YEAR LIMITED WARRANTY


Model Name: Fluval FX6 High Performance Canister Filter


Color: Black


Size: FX6


Material: Rubber


Age Range Description: All Life Stages


Care Instructions: Regular Filter Maintenance


Number of Items: 1


Style: FX6 Filter


Breed Recommendation: All Breed Sizes


Included Components: Product in Descripton


Specific Uses for Product: Indoor


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Apr 2

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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Top Amazon Reviews


  • The Best!!
Size: FX2
I have always been a hang on the back filter guy. After getting a new 60 gallon tank, I decided to make the switch. This filter has been nothing short of amazing. It was so easy to set up and worked perfect right out of the box. The cleaning process has also been super easy. It also has the ability to change the filtration that you need at any time. Overall an amazing filter that I will continue to use. ... show more
Reviewed in the United States on February 26, 2025 by Jeremy Souza

  • 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

  • Easy to assemble, quiet, extremely efficient......
Size: FX6
I've been keeping tropical fish for over 50 years, and I know quality when I see it. In point of fact I've always been more of an Eheim man, until a friend told me about the Fx6. My complaint with Eheim was the fact that it can be a pain to prime, and I didn't want to go through that again, so I took the plunge and bought the Fx6 for my newly setup 125 gallon tank. When the package arrived I was shocked at the size of this thing. It reminded me of a canister vacuum cleaner. After a quick unboxing, and cursory accounting of parts, I began the process of assembling the filter at 5:15 PM. At 5:45 PM, I turned it on, watched it cycle, and then settle down to a almost silent hum. I didn't have to do anything but watch. It did it all. No sucking on the intake to get it to prime, no water splashing everywhere because you couldn't get the hose on fast enough, and no fuss at all. How nice is that? The outtake, while very strong, was easily adjustable, so the stream pointed upward, and away from the middle of the tank. You cannot hear one little drop of splashing water. I will be keeping Discus and they don't like hurricane water. Like most new tanks mine was quite cloudy, and had been for a couple of days before I started the filter. Overnight the cloudiness completely disappeared and the water is almost crystal clear. Bottom line: while expensive it's one of those "you get what you pay for" situations and I consider this easy to assemble, simple to start, highly efficient filter getting what I paid for. I recommend it most heartily for the reasons I have mentioned. Incredibly easy to assemble and starting is a matter of plugging it in. Very quiet and by all appearances very, very efficient. If you have one of these there is no need whatsoever to use an additional filter on a large-100-200 gallon tank. This big boy will take care of everything for you. ... show more
Reviewed in the United States on September 12, 2015 by Michael J. Scott

  • The best filter we have ever had
Size: FX6
We have had hang on backs for ever..this is a game changer. Yes it is pricey but in my opinion it is worth it. We are using this for our 75 gallon and its amazing. We have it on the bottom shelf of a stand and had to put Styrofoam under it so that it didn't rattle but that was an easy fix. Now it is whisper quiet and wonderful. Our tank looks beautiful and clear and looks much less cluttered then with the hang on back filters and their many wires and bulkiness. It was somewhat simple to set up as long as you take the time to read the instructions carefully. ... show more
Reviewed in the United States on August 16, 2024 by William & Ana

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