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Fluval

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

  • Based on 5,901 reviews
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Availability: In Stock.
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Arrives Nov 18 – Nov 19
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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


Global Trade Identification Number: 93


Manufacturer: Rolf C. Hagen (USA) Corp.


UPC:


Specific Uses For Product: Indoor


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: #8,158 in Pet Supplies (See Top 100 in Pet Supplies) #22 in Aquarium Filters


#22 in Aquarium Filters:


Customer Reviews: 4.4 4.4 out of 5 stars 5,901 ratings


Brand: Fluval


Color: Black


Material: Rubber


Style: FX6 Filter


Power Source: Corded Electric


Item Weight: 19.9 Pounds


Global Trade Identification Number: 93


Manufacturer: Rolf C. Hagen (USA) Corp.


UPC: 015561102193


Specific Uses For Product: Indoor


Item Weight: 19.9 pounds


Language: English


Item model number: A219


Date First Available: May 14, 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


Brand Name: Fluval


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


Directions: See included instruction manual


Country of Origin: Italy


Warranty Description: 3 YEAR LIMITED WARRANTY


Model Name: Fluval FX6 High Performance Canister Filter


Size: FX6


Age Range Description: All Life Stages


Care Instructions: Regular Filter Maintenance


Number of Items: 1


Breed Recommendation: All Breed Sizes


Included Components: Product in Descripton


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 18 – Nov 19

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
    • Send it!!! You won’t regret it.
Size: FX6
Ive been running the Fluval for about 3 months now, and I am absolutely OBSESSED with its quality. I have a 75 gallon tank with a turtle and pleco (both produce A LOT of waste). Previously I was a die hard Penn Plax Cascade fan for the last 5 years, but my last two had motor failures and they changed their warranty terms finally, so I decided to switch it up. Long ago I wanted a Fluval, but but the price was steep so I settled for less and let me just say it’s the best investment you can make. It’s quiet (don’t know why other reviews say it’s not unless they are keeping their water levels really low), my tank remains crystal clear with my normal monthly maintenance routine, and it is easy to clean and change out my media. The fasteners are really not that complicated and don’t take that long to unlock like other reviews say. The canister itself is designed so that it is air tight and I’ve had no signs of leaking. The outtake is made so you have two options to direct the flow of your water which is helpful if you have a basking platform above half of your tank. Highly recommend. ... show more
Reviewed in the United States on October 1, 2025 by Carley
    • High recommend.
Size: FX4
Works great very durable and really pumps water through. Set up was a bit much but not more than any other large canister filters I would assume. Very customizable for your tank and outlet setup. Price is also a bit high compared to competitors but I definitely feel the quality is there. In reality if you bought a 200 gallon fish tank $300 for this filter shouldn’t be out of your budget and definitely can’t go wrong with this purchase. ... show more
Reviewed in the United States on October 13, 2025 by Dara Leary
    • Very very Happy
Size: FX2
FX 2 I have for a 55 gal, FX 6 for my 180 gal. These are the very best filter systems I have ever owned, and you can’t hear it run, it is perfect. THANK YOU
Reviewed in the United States on August 28, 2025 by Jeff cagle
    • So glad I purchased this filter!
Size: FX2
I had an Eheim canister filter before this Fluval FX2. There is a NIGHT AND DAY difference! WOW, so much easier to clean and keep up and running! No priming needed and it works so well! My aquarium is so clear and the water is so clean! I love this canister filter!
Reviewed in the United States on October 19, 2025 by Krista M
    • Disappointed In the $300+ filter 😒
Size: FX6
Review Image by Melissa S. Melissa S.
Review Image by Melissa S. Melissa S.
Review Image by Melissa S. Melissa S.
*UPDATE* Instead of giving advice or suggestions, Fluval customer service decided to blame me and my light sources aka natural light. I told them multiple times that my turtle tank isn't near natural light and that I never had a problem with other filters with heated lamps. I even cleaned out the filter and the tank AGAIN without light and still algae. It also GOT GREENER!!! My poor turtle is stuck in a smaller tank till I can purchase a new filter or until I can figure out the problem myself. Then the customer service rep flat out told me their filters aren't meant for turtles 😐. I have had this filter for a little over a month now (close to two) and I am extremely disappointed! This filter has not cleaned a thing! Then the water started to become super green! I cleaned out the filter as well as the media and noticed algae all in the filter. I added new media hoping to clean the water a bit better AND YET algae is still growing. So (as shown in the second picture) and completely cleaned the tank and emptied out all the gravel. I completely cleaned out the water and added fresh water the old fashion way and still GREEN WATER! This filter has caused me nothing but trouble and my poor turtle has to stay in a small tank (because I couldn't afford a bigger one for him to temporarily stay in) until I figure this out. And no, algae removers/reducers aren't helping! A $300+ canister filter and it has not cleaned crap! ... show more
Reviewed in the United States on January 26, 2025 by Melissa S. Melissa S.

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