I recently upgraded to a 400 gal. Right now I have a silver aro, florida gar, redtail cat, and a farmie peacock bass. I was considering getting another cichla. The one I have now is around 6-7 inches... Not sure if it's male or female. Can I safely add another cichla? I've heard that it's best to keep them in larger groups so aggression is spread out over more than one individual. I'm also concerned if they both ended up being males, what would happen then? If it could work, what species can I try? Right now I'm looking at a kelberi, azul, or temensis. I could use some advice or tips.