I have kept a Flame Angel and a Pygmy Angel (both in the dwarf angelfish family, Centropyge) together in a 75 without any
problems at all. That said, my tanks are never the common reef aquariums. This particular tank was in an East facing window with plenty of
algae growth for those two, plus there were two large Tangs, a 5" Yellow
and a 5" Purple.
Here is one pic of the tank at night.
Here it is from the end with the sunlight coming in from the left.
(Gorgonia from FL are under-appreciated in the hobby.)
Edited by Mark Peterson - April 17 2012 at 3:47pm