my situation. 6x2x2 with 8inch female festae, 3inch male dovii, 3inch red devil, 8inch red claw crayfish, 2 6inch barcoo grunters, 2 6inch male convicts, 2 freshwater mullet and a 7inch male texas. the texas is trying to mate with the festae and is going nuts at everyone else. she isnt really responding but his aggression is disrupting an otherwise nice tank. can he be stopped?? oh yeah, if u think ca/sa cichlids are mean - try some Aussie natives!! I had a 14inch male dovii in a 6x2x2 alone, added a 10inch sooty grunter that had to be pulled out after 20mins cause the dovii was in real trouble!!