So few months ago I decided to start a cichild tank. I have a 55 gallon tank which I randomly stocked with random mbuna and juvenile peacocks. After some research I decided to home the peacocks separately in a 50 gallon for now and found a new home for my zebras and some random blue things I'm not sure what they are. So here's my question, I have 5 yellow labs and 5 demasoni left, how many more of those can or should I put in the tank to have some balance? Also is there another kind of cichild I can put in this tank or should I just stick with these two species. I don't want any interbreeding going on so what other species would fit?