African butterfly fish are schoolers, the more the merrier. I had a pair years ago, that I fed plenty of live food. They will eat insects, and I fed them whatever I found handy (flies, moths, etc.) as well as wax worms from the lfs. There was never any aggression between them. The horrible thing was, I added a banded leporinus to the tank. The encyclopedia I had listed it as a vegetarian. The "vegetarian" ate the female butterfly fish alive, a little bite at a time. I came home one day to find the female with a chunk of her abdomen missing, with a load of eggs inside. My first thought was that something had taken a huge bite out of her, so I removed the bicher from the tank, and took it back to the lfs. When I got back, the damage was even worse, so I watched. The leporinus would swim up and nibble another bit off, while the butterfly seemed oblivious to what was happening. She didn't even try to move away. The leporinus also turned out to be a rather aggressive fish, not really suitable for a peaceful community.
