Hi,
I have a breeding pair in my 54 gallon tank. When its breeding time, they can be quite aggressive, but when its not, there quite peaceful for Cichlids. They get along great with my Cories, but my female Firemouth and my male Three-Spot Gourami constantley lip lock and fight (the Gourami usually wins) and on a occasion the male Firemoth will help her out in the fight.
Mine are about three and a half inches and have seemed to stop growing.
Overall I really like mine and they are sooooo pretty when breeding.
Cory Lover