I have a colony of 28 chimba in a 125 gallon fish tank. With Carib Sea Arag alive bahamas oolite sand. 1 FX4 canister filter, 1 Fx6 canister filter and a marineland 360 canister filter 2 marineland Emperor bio wheel hang on back filters 350, 400. 2 Hydor Koralia 1500 evolution wave makers 850, 1400. I know its a tad bit of over filteration but these fish are heavy poopers and require fresh clean water. Each filer has Seachem Purigen in them except the 2 hang on back filters.