75 gallon (just moved every thing from a 55 except for the cc.I have a purple tang,blue damsel,pinkand blue spottod goby,bicolor blennie,3 percs,rose bubble ,green bubble,some gsp,zoos,and to colts along with the brain.Water checks out fine.I still have the canister from the 55 running until the wet-dry can handle the bioload by itself.also have about55 pnds figi rock and 10 tonga.Herse a tank pic