My husband's Red Sea Max housed a clown for two years along with her frogspawn that she hosted. When I put up my 180 I stocked it six months ago with a pair of clowns - they refused to host anything in the tank. I broke down my hubbys tank and couldn't find a home for his clown so I decided to try placing all three clowns into the 180. One week later all three are hosting the frogspawns in my tank and are inseparable! I'd always wanted something to school but I didn't think it would be my clowns! (lol)