Search  for anything...

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

  • Based on 5,099 reviews
Condition: New
Checking for product changes
$366.95 Why this price?

Buy Now, Pay Later


As low as / mo
  • – Up to 36-month term with PayTomorrow
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

Eligible for Return, Refund or Replacement within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Wednesday, May 8
Order within 7 hours and 51 minutes
Available payment plans shown during checkout

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: #10,214 in Pet Supplies (See Top 100 in Pet Supplies) #21 in Aquarium Filters


#21 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: 20.51 x 15.63 x 15.3 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, May 8

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.

  • Klarna Financing
  • Klarna Pay in 4
  • PayTomorrow Financing
  • Apple Pay Later
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • 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

  • It’s clean
Size: FX4
I really like this filtration canister. It does a great job of keeping my saltwater aquarium very clean. The only thing I don’t like is that it’s very bulky, but that’s OK. What matters is that? It does a great job and filtering I highly recommend it. It’s a little pricey, but it is a great canister filter. ... show more
Reviewed in the United States on April 8, 2024 by Amazon Customer

  • Works great
Size: FX4
This is the second FX4 we've bought we currently run one on our 75 gallon and just bought this one for our 125 gallon tank and it keeps our tanks crystal clear. They are easy to clean and set up and work great. We've had our FX4 on our 75 gallon now for 4 years with no issues.
Reviewed in the United States on March 31, 2024 by Kindle Customer

  • See below for positives, negatives, and tips!
Size: FX6
Canister filters get too bad of a wrap... I think the use case for them CAN be great for some. Positive You can take the entire filtration system out and clean it (very hard to do with sump, and yes, detritus/other waste can get past your mechanical filtration, and get stuck on your biological media/tank walls/etc) Very quiet Good flow through aquarium... can be a negative I use mine on a 75g tank, and a sand substrate. The flow is so nice that all the detritus ends up in the canister, and I never have to gravel vac the sand, like, ever. I had to use one 530 GPH wave maker to assist with one dead spot, but it cost like 12 bucks. The detritus has to end up somewhere. Either you have to gravel vac it out, or it gets stuck in your mechanical filtration. I'd rather just concentrate it in one spot (the canister) so I don't have to look at it, and clean out my canister once every two weeks in a heavily stocked African cichlid 75g tank. Keeps the tank sparkling clean, Ammonia/nitrites at zero, and Nitrates are 10ppm after a couple months of use (could be higher later, I'll be sure to monitor it closely) Negative Expensive More difficult maintenance than hang on back, but less frequent. Too much flow can be a problem for some fish Big Tips 1. Buy an extra outlet valve, and attach a 1 inch pond hose to it. and BOOM you have a python that is MUCH faster. I can fill 40 gallons of water for a 50% water change in about 5 minutes from a storage container 20 feet away in my bathtub that already has dechlorinator/buffer/cichlid salt in it, and I stick a digital thermometer in the storage container when filling it to make sure I don't shock my fish with a sudden temp change that is EASY to do with a python. 2. The drain valve is painfully slow for large water changes, but this is an option as well. Use a 5/8 inch reinforced hose, like this one: https://www.amazon.com/gp/product/B01MRUROKO/ref=ox_sc_saved_title_10?smid=ATVPDKIKX0DER&psc=1. Taking the hose off can make a mess if you have leftover water in the hose, so you can use a 5/8 quick release fitting with valves. (valve shuts off flow of water when the fitting is released). Part numbers: HFCD221012 HFCD171012 This will make the flow rate even slower (valves slow water flow when they are this type), but it eliminates the chance of making a mess. 3. How to keep the inlet/outlet hoses out of the way during maintenance: A. Attach a 3m command strip hook to the underside of the aquarium, right above the canister filter. B. Attach a loose zip tie to the outlet and inlet valves C. When moving the canister in/out of the aquarium, hook the inlet/outlet hoses to the underside of the aquarium so they are not in the way 4. Make sure when setting up the aquarium that the outlet valve is as short and direct as possible. The inlet can be long, as it is gravity fed through the principles of a syphon, but the outlet has to be actively pumped by the canister, and flow rates can be much slower if it is far away. I guess you could use this knowledge to your advantage if you desire lower flow rates. ... show more
Reviewed in the United States on April 6, 2019 by John O'Neil

Can't find a product?

Find it on Amazon first, then paste the link below.