med- large cichlid, max size around 11-12", single specimen in a 55 would be fine, 75+ for a pair, normal cichlid temps any where from 74-82 degress. diet can be as simple as cichlid pellets, though would be better if varied with an occasinal snack of something meatier. any normal substrates are fine. known to be an aggresive and tempermental fish. there a awesome fish, if you chosse to keep them you made the right choice.