Originally Posted by
Pontius
there are 2 families of "dwarf" angels: the Centropyge family and the Chaetodontoplus family. you could keep 1 of each family in a 75 gallon without any problems whatsoever. these 2 different families of angels are shaped different enough that I honestly don't believe they recognize each other as being angelfish. I've kept them together and they respond to each other no different than they'd respond to a tang.
here are the combos I've kept:
*in my current 180 gallon, I have a coral beauty, flame angel, and herald's angel (all of the Centropyge family) and I've had no problems at all. I've had them together for close to a year.
*in a 115 gallon, I had a flame angel and coral beauty (Centropyge) and Indian Yellow Tail (Chaetodontoplus) without any problem. the IYT angel eventually died and I replaced it with a bluespot angel (Chaetodontoplus), and again the flame and coral beauty did not recognize it as anything out of the ordinary.
*in a 72 gallon, I had a flame and coral beauty (again, Centropyge). in this case, there WERE a few problems, but it never resulted in anything more than a little chasing each other around. and after both got settled, they seemed to calm down a bit. the coral beauty had been in the tank almost a year and a half before the flame was introduced but it was the flame who turned out to be more aggresive.
however, despite my good experiences, I personally wouldn't recommend 2 Centropyes or 2 Chaetodontoplus in a 75 gallon. but I DO think you be perfectly fine with 1 of each. but take my advice though....with the Chaetodontoplus angels, I've found they are as ich prone as some tangs. I would not recommend getting one unless you QT with hyposalinity. both the Chaetodontoplus I had got ich soon after being introduced to the tank. if you have read up on them, they have a reputation as being very hardy, but that's not true in my experience.
WOW !! Very interesting observation ...