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

been eseing this for ye

I read over and over that the other (white pads) clog too easily and the blue pads (these) work better for water clarity. I put these in my FX6 used for a turtle setup and the water has been crystal clear since the tank completed its cycle. I have never used the white pads, but I really see no reason to try them while these are working great. I did a full review and a detailed setup on the FX6 for my turtle setup you can read if you interested in setting one up for turtles. Overall I think these are excellent pads and I will continue to use them.

Works well in my FX6. No complaints.

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

I love them, I always have them on hand for polishing water. I use them in sunsun 603b canister, and in cut to fitnAquaclear 50, 70 and 110 hob. Works perfect

It’s good

It is what expected

Ive used this pad in the bottom tray of my FX6 for awhile now with no issues. Seems to trap a lot of debris (a good thing) so you have to rinse it in tank water every once in awhile. It also definitely helps to reduce the smells associated with my african cichlid fish tank and canister filter.

easy to use, perfect fit in filter, effective

I was expecting this to be an exact fit, but its smaller. So I feel it will bypass some of the water it should filter.