16% of 19 verified Fluval 407 Performance Canister Filterowners don't recommend it — based on real owner comments from Reddit, enthusiast forums, and YouTube.
For balance: 74% recommend it. This page collects the complaints so you know what you're signing up for — read the full owner report for both sides. How we score
“I do not recommend the Fluval simply due to their aqua-stop valve being poorly made and their clamps that hold the top down are not ideal either.”— SigmaLance on Reddit
“if still no improvement I'm moving on from fluval as my second hand 307 isn't much better”— Ok-Temperature-6559 on Reddit
“When I ran 4 series they were always a pain to restart.”— SteadyHigh on Reddit
Not complaints — practical notes from owners that didn't affect the score.
“Extra info...They are in a 75gal fully cycled etc. using a Fluval407 with a spray bar facing the back of the tank to minimize flow and they also have two air stones. I'm currently cycling out the black sand so don't come at me please. I don't want to take it all out at once and have a cycle crash.”— DSNYMisenarlyfe on Reddit
“It's a Fluval 407 Performance Canister Filter we bought it at Pet Smart.”— Limp-Ad8550 on Reddit
“And #2 it takes up space in the filter where instead you could have more bioballs and some foam etc which is always great to have more of. My fluval407 is filled with nothing but sponges and bioballs and the likes... I'm only 3 yrs in, but from what I've read, that is how most successful aquarist do it.”— TranquilTurkey on Reddit
“Fluval 407 Performance Canister Filter. Have not added any substrate at the bottom since upgraded to the bigger tank. Only the turtle, filter and her platform.”— ewokzombie on Reddit
“And this is the canister filter I use, I have a 75 gallon tank so depending on your tank size you could get the smaller version https://www.petsmart.com/fish/filters-and-pumps/filters/fluval-407-performance-canister-filter-5290152.html”— pikachusjrbackup on Reddit
“The whole thing was valued over $825. All I needed to do was get a high powered water heater ($50), get new media for the filter (about $70 total), added some decorations (about $100 total) as I already had my turtle topper, and the whole upgrade was about $370.”— xVellex on Reddit
“https://preview.redd.it/very4q2chsuf1.png?width=1080&format=png&auto=webp&s=a720405581311211f1266531959a13118e558697 I did a hose swap on this 407”— nderworldaquatics on Reddit
“I have both the FX4 and 407. My personal opinion is that the FX4 works best in 6ft long tanks, unless you need strong water flow. It's very powerful. The 407 is suitable for a tank that size.”— StickyDogJefferson on Reddit