Currently running a 55 with 2 bala, 3 tinfoil, 1 leporinus, 1 gold dojo, and what I believe is some varioation of a yoyo loach. They range in size from 3 to about 8 inches. Time to upsize. In my early 20s (a loooooong time ago) I had as many as 6 tanks. Once had a 72 with african cichlids, a blue eyed placo, and a very large pacu. Glad to have found this site. Looks like a good resource.