i have heard that it is possible to "crowd" CA cichlids they same way that you keep africans. i have not tried it. there are threads on this site that you can search for. this is where i read about it. it said that you need at least a 180 gallon. and that there had to be ALOT of fish in the tank with no territories to fight over. the theory is that with them that crowded and nothing to fight over, that they get along. i saw some sample tanks, but i don't have it in me to try it. the other thing was to try to grow the fish out together. search for "crowding CA cichlids"