Join Date: Dec 2012
Location: Lehigh Valley, PA
Angels dont need much swimming space. As long as you keep up on water quality, they'll be fine. And don't worry so much about e aggression. If they're male/female, chances are they'll pair up and start spawning for you. If F/F, they may pair and attempt to spawn. Keep an eye if one lays eggs without pairing with the other, there may be some aggression. If you have tall structure-plants, wood, etc- the other one will be able to get out of sight. If M/M you may get lucky, and the dominant one won't be too aggressive, and they will live together fine. With no females to fight over, aggression would likely be limited. Of course, they are cichlids, and everything I just said can be turned upside down by the individuals' personalities.
For what it's worth, I had two simultaneous spawnings with two pairs, in a 65 with medium planting. Plus, there were two singles in the tank. I bought six waiting for them to pair, and they did before I had a chance to get them out. A lot of territorialism, but no damaging violence.
And if push comes to shove, and you want to move them, let me know.