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Fluval

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

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Availability: Only 8 left in stock, order soon!
Fulfilled by MarineAndReef
Arrives Monday, Oct 5
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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


Product Dimensions: 20.87"L x 15.75"W x 15.75"H


Power Source: Corded Electric


Item Weight: 19.9 pounds


Maximum Flow Rate: 3500 liters per hour


Maximum Lifting Height: 21 inches


Horsepower: 41


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: #7,816 in Pet Supplies (See Top 100 in Pet Supplies) #20 in Aquarium Filters


#20 in Aquarium Filters:


Customer Reviews: 4.6 4.6 out of 5 stars (3,459)


Power Source: Corded Electric


Flow Rate: 3500 liters per hour


Maximum Lifting Height: 21 inches


Horsepower: 41


Material Type: Rubber


Item Highlight: Canister Filter for Aquariums


Color: Black


Product Style: FX6 Filter


Item Dimensions L x W x H: 20.87"L x 15.75"W x 15.75"H


Item Weight: 19.9 pounds


Brand Name: Fluval


Model Number: A219


Global Trade Identification Number: 93


Number of Packs: 1


Manufacturer: Rolf C. Hagen (USA) Corp.


Number of Items: 1


UPC: 015561102193


Manufacturer Warranty Description: 3 Year Limited Warranty The Fluval FX4/FX6 High Performance Canister Filter is guaranteed against defects in material and workmanship under normal aquarium usage and service for 3 years from date of purchase. Non-replaceable and non-serviceable parts will be repaired or replaced at Rolf C. Hagen Inc.’s discretion, free of charge, when the complete filter is returned with all components along with a valid proof of purchase and postage paid. This warranty does not apply to any filter that has been subject to misuse, negligence or tampering. It does not apply to filters which have been incorrectly assembled or unsuitably maintained or where installation and maintenance instructions have not been followed correctly. The warranty does not apply to wear and tear parts such as the impeller, impeller cover or motor seal. No liability is assumed with respect to loss or damage to livestock or personal property irrespective of the cause thereof. Before returning the filter under warranty terms, please ensure that all setup and maintenance instructions have been followed. If you are in doubt, please contact your local aquatic specialist retailer for further advice before returning the product. THIS DOES NOT AFFECT YOUR STATUTORY RIGHTS.


Unit Count: 1 Count


Specific Uses For Product: Indoor


Importer Contact Information: Maple Pets International Pvt. Ltd., Indore, Madhya Pradesh


Included Components: Product in Descripton


Item Type Name: Fluval FX6 High Performance Canister Filter


Packer Contact Information: Rolf C. Hagen., Italy


Manufacturer Part Number: A219


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Oct 5

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

    • Worth the investment!! Don’t be scared to try it out!
Size: FX6
Review Image by Maria Millan
If you were looking for a reason to get this filter like I was, LET THIS BE THE REASON!! This is one of the best investments I’ve made for my tank and I haven’t regretted it yet! Ive always wanted to try the fluval canisters but I’ve been too scared to invest SO much money into something that I wouldn’t know would REALLY work or not. I’ve always had filtration issues especially due to the fact that I have fish that make so much waste including a large turtle. For reference I have a 75 gallon and this filter is way more than enough to cycle that size. I do plan on upgrading to a 150-200 gal in the future once I finally move out of my apartment, which is why I decided to go ahead with the FX6 instead of the 4 for right now. So far again I am not disappointed, I haven’t had to deal with cloudy water, I’ve only really had to do surface cleanings on the sand and top my water off from time to time but other than that my water has never stayed clearer! Like other reviews have mentioned tho, I would try to place the intake horizontally if you have sand or any small substrate because it will suck it up! It’s not a major issue for me but I know for some people it might. The filter is also very quiet, and I haven’t had any issues with it ‘stalling’ or anything like that which I know is normal anyways if it does happen. It was also pretty easy to put together, I do have to admit tho I was a little confused on some of the directions but at the end of the day I ended up figuring it out lol. But yes again I would highly recommend, and I literally NEVER make Amazon reviews but I just wanted to come on here and give my opinion to someone who may be looking. DEFINITELY WORTH THE INVESTMENT!!! Do it for your aquatic babies! 💕🐠 ... show more
Reviewed in the United States on September 15, 2026 by Maria Millan
    • 10+ Years Going Strong
Size: FX6
I've been using the previous version of this filter since April of 2015 without any issues with it. I have it setup for my 75 gallon which I think is the perfect amount of filtration for a 75 gallon to maybe a 125 gallon before you need to run duals. I have to clean the media only twice a year, so no big deal when I do have to do it & there are several options for media you can use in it. You will want to get the service kit for the motor & replace those bits along with the new gaskets in the kit to replace the old ones. Use a slight amount of silicone grease on the o-rings to help prolong life, but after 5 or 6 years you might hear the bushing in the motor start making noises anyways & that's when you need to get the service kit. I got the optional spray bar for the it & that is a worthy investment too & looks cool if you prefer a smoother outflow across a larger area. It's very quiet too unless the motor's bushing is bad, then it's noisy. The only real noise it makes when in perfect shape is the gurgle of bubbles escaping every 12 hours to purge the air that has built up inside the filter. Really nifty feature. It is a little pricey but it has been a very worthwhile investment for my tank & I haven't had any issues with it for over a decade of continuous running besides it being off for a few power outages & when I clean it out. Your tank & bio-load will be different than everyone else's, so it may take a little while to determine when to clean it, but general rule is when the outflow is really low or the impeller stops due to gunk buildup. Some may have to do it once a month, others maybe once or twice a year as I have to do. This filter has just been a real tank for me in the past 10 years so it gets an A++ from me. ... show more
Reviewed in the United States on October 31, 2025 by Stephen Malone
    • 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
    • Wow! This filter is quiet!
Size: FX6
I purchased this for a 20 gallon tank to help with cloudy water from algae as my little Aqueon filter couldn't hack it. I took it out of the box and whoa, it's a beast! I thought maybe it was going to be too much filter for the tank, I was wrong, it's a great size. The canister itself goes together very nicely and both inlet and return connectors are clearly marked and very strong. The hoses are beefy and very stiff, which is the only troubling issue that I'm dealing with. The very simple and small instruction pamphlet suggests to soak the hoses in warm water to make them more pliable. I did this, it worked ok, until the hoses got back to RT. The tube sizes are quite large and the tank lid does not sit flush. I belive I will change to a tank mounted light rather than a top. I've found the intake tube to be very long and is sitting at the bottom of the tank, I'm not really a fan of that, but so far it seems alright. Priming... well, the priming pump on the canister is smooth and has decent suction unless there is a lot of air in the canister, and this made priming the tubes quite frustrating. I'm not an expert, fairly new at keeping fish, and I've always used a hang on the side filter, so this was a new method of filtration. It took me about 15-20 minutes to get the tubes properly primed and full, how I did it still not sure, but when it happened, outflow was nice and steady. The instructions did not have any suggestions or methods to make it easier, and as a new user of a canister filter, I would have liked to have had that. I'll have to make some adjustments with the tubes but that's a minor inconvenience. This filter is definitely worth the money, you shouldn't be disappointed. ... show more
Reviewed in the United States on March 13, 2024 by tomer 66
    • 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
    • Minnie loves her water now
Size: FX6
I ran this filter with my turtle overnight and the water looked like it had a full water change. It is a bit louder than my 307, as I hear trickling water. But if I had to choose, I would buy again.
Reviewed in the United States on September 25, 2026 by Asher rowe
    • Need to get
Size: FX6
Good filtration, doesn't break , wish it had better deals , quiet, no leaking, also wish they had extra media for later
Reviewed in the United States on September 16, 2026 by dcam_14
    • It does the job easy.
Size: FX6
I'm very impressed with the FX6, it's quite, and does a good job. My first canister filter, i truly like it. I would recommend for 125 gallon aquarium.
Reviewed in the United States on September 23, 2026 by Max

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