So I'm thinking of getting Altum Angelfish for my 50 gallon. The only other inhabitants will be glowlight tetras and a red lizard whiptail catfish (some call it a pleco... I was considering Otos but was too worried about their health/diet). I've read that Altum Angelfish do not breed in captivity (they are all wild caught, I think). Does this mean I have less to worry about with pairing? Could I stock three in my tank without worrying that two will mate and pick on the other? Or could two pair and never breed, but still be a threat to the odd one out?