Had this filter for more than 3 years now, I get it maintenance and cleaned every 2 1/2 months, works phenomenally for my RES TURTLES! Best filter, hands down!

Thrilled with this canister filter. Water was clearer almost instantly. I never realized it until it was gone how much space the hang on the back filter was taking. My tank looks so much bigger and cleaner!

I ordered this online & had it shipped. I put it together according to the instructions. It leaked water all under my aquarium & all over my floor. I tried starting a return & was unable to mail it back even though that's how I received it. I had to take it to a store. The nearest is over an hour from me. Plus I have to wait for approval to return it which I have yet to receive. So I have an over $200 leaky filter I'm unable to return. Order elsewhere if you order.

Will give “zero” star if it’s possible. Very disappointed

Best filter i have ever owned. Super powerful and quiet.

I recently upgraded my aquarium filtration system to the Fluval FX4, and I couldn't be more impressed with its performance. As an avid aquarium enthusiast, I've tried various filtration systems over the years, but the FX4 truly stands out for its efficiency and reliability. First and foremost, the FX4 offers exceptional filtration capacity. With its multi-stage filtration process, including mechanical, biological, and chemical filtration, it effectively removes debris, toxins, and impurities from the water, ensuring a clean and healthy environment for my aquatic pets. One of the standout features of the FX4 is its robust build quality. Constructed with high-quality materials and precision engineering, this filter is built to last. The solid construction not only ensures durability but also minimizes noise, providing a quiet and peaceful aquarium environment. Setting up the FX4 was a breeze, thanks to its user-friendly design and comprehensive instructions. The quick-start guide made installation simple, and the self-priming feature eliminated the need for manual siphoning, saving me time and hassle. Another aspect that impressed me was the FX4's versatility. Whether you have a freshwater or saltwater aquarium, the FX4 delivers optimal performance across various tank sizes and configurations. Plus, its compact design allows for easy integration into different setups without taking up too much space. Maintenance is a breeze with the FX4, thanks to its innovative design features. The removable media baskets make cleaning and replacing filter media a snap, and the built-in maintenance indicator lets me know when it's time for routine servicing. Overall, I can't recommend the Fluval FX4 enough to fellow aquarium enthusiasts. Its exceptional filtration performance, durability, ease of use, and versatility make it a top choice for anyone looking to maintain a healthy and vibrant aquatic ecosystem. Whether you're a beginner or a seasoned hobbyist, the FX4 is sure to exceed your expectations.

Bought this filter 2 1/2 years ago and it performed very well in cleaning my turtle tank (55 gal). I wanted a good filter as turtles can be dirty and was willing to pay the high price for this filter based on the reviews. Replacement media is expensive although I didn't have to change it too often as it was easy to clean. The big downfall of this filter is the durability. At the 2 year mark my filter started to fail by not starting after cleaning it. I bought a new impeller thinking it was worn. Was able to extend the life of the filter by 3 months. Same issue again, filter failed to start up. Googling "Fluval FX4 Motor or Impeller issue?" ( https://www.reddit.com/r/Aquariums/comments/16mhgre/fluval_fx4_motor_or_impeller_issue/ )I found several people had the same issue. What it comes down to is the motor needs to be replaced. If you can find one it isn't cheap (Half the price of the filter!). I decided to search for a different filter as I wasn't going to spend that kind of money replacing the motor and then 2 years later being in the same situation. Bottom line - Great performing filter but absolutely horrible durability. I would stay away from this filter.

Purchased this pump after buying two defective ones from petsmart both were other brands. My tank had started getting green water "I over feed them baby's. The others i liked seeing as they came with a polishing filter with pump this one i had to buy separately, and i did. they had to be shipped to me but pump was in stock at store. I decided to set it up and just run it and add the extra filters when they arrived, but to my amaze the water was back to crystal clear buy like day three and has stayed that was for over a month now without adding the polishing filters. filter is a little more involved to open and maintain but well worth it very high quality.