65 gallon freshwater. thanks in advance for your suggestions: it looks like it is snowing in my tank. it has been this way since i set it up in mid november (except for the 4 weeks i had algae bloom). LOTS of white suspended particles. i have an eheim canister filter 2213, which i've cleaned at least 3 times (and changed the ehfisynth media). i've tried polyfilter as well as drops that coagulate in your filter to catch fine particles. i even stuck a 2nd filter on there (a biowheel for a 75 gallon), but neither of them will filter out this crap. i've done daily water changes for weeks at a time. some of it isn't even fine, it's big stuff. i'm not overstocked. i have plastic plants and driftwood. 4 small/medium clown loaches, 3 khuli loaches, 3 dwarf african frogs, two plecos, two kory cats, two little puffers, 3 tetra, beta, 5 or 6 guppies.