Hi all. Im wondering if someone has had the same trouble I have and can give me some suggestions? I set up a 135 probably 1.5 months ago and I am running 2 Fluval FX filters on it a 6 and a 4. I went with these filters against my gut feeling to stick with my sump, due the fact that the sump is a little noisy and the 135 is not drilled and the FX filters are supposed to be very quiet and great for mechanical filtration. At least from what I read. I used all cycled media from my sump in the canisters. My substrate is Caribsea Eco complete African Cichlid sand. I love the look of it however the FX filters will not pull out all of the very fine dust that continues to float around my tank. I've tried everything I can think of Poly fill, Filter sock material polishing pads, I even bought some of those Fluval brand polishing pads. Nothing seems to be working. It always looks like there is grains of salt floating around in my tank.