Fluval FX4/FX5/FX6 Bio-Foam, Replacement Aquarium Filter Media, 2-Pack, A239

Perfect fit easy to clean.

Works perfectly for my cannister as it should! I have not taken a chance on off-brand replacement media so I dont have much to compare to but obviously if you want direct fit and replacement, this will accomplish it.

Good

Tried buying a knock off didnt work out so well. So for now on Im strictly staying to their products. Yes they may cost more but you cant complain with the satisfaction.

Great product!

Factory brand.filters work great and are worth the little more expense

Theyre ok, I guess. I noticed a SLIGHT improvement in my water clarity. I have 4 fancy goldfish in a 110 gallon and I feed Repashy Super Gold, so my tank is pretty messy. Im running an FX4 was unhappy with the clarity of my water. I put a fresh water polishing pad in the filter weekly and rinse out the old one to re-use. The pads are not very durable and Ill probably only get 2 uses out of them before they disintegrate. They are fairly inexpensive though, so I MIGHT buy them again...I dont know. I ended up adding a separate water polishing filter and some Purigen and my water is finally clear enough to satisfy me.

Fit perfectly in my fx4 and made it look like my fish we’re flying in the tank

Great replacement product

It is good and works perfectly fine in my FX5. It is a bit expensive though! It comes in a nice box but I dont mind buying the foam pads in a cheap bag if this would lower its price. Im throwing the box in the trash anyways.