Ive got a 55 salt and I currently got a 5'' Red Sea Pacific Sailfin tang, 6'' Panther Grouper, 3 '' baby Volitan, 6'' Greenbird wrasse, and a 5'' Flame saddle Dotty back. Im planning on add ing a Fumanchu lionfish sooner or later and Im going to add a marron clown wants it matures. Is a 55 to small for all these guys.