And I hope sand as a substrate.
2 clownfish, perhaps the ocellaris clowns (false percs)
2 or 3 blue/green chromis
and perhaps one other medium sized fish like a flame angel or coral beauty.
Thats about all I'd put in a 55 gallon.
In my 55 I have a six line wrasse, rusty colored angel, 2 false percs and 2 bangai ___ and several corals. Haven't had any problem with any of it. :happy: