thanks chronik! i have never mixed species.. but as i now have a cobalt blue pair! i have had to remove a large male from the tank and have had to move him to my choco tank with a divider between them.. they are both around 5 inches and both are male.. they are constantly flaring and i know if i did remove the divider (which of coarse i wont!) they would deffo tear eachother apart! i would personally not mix species, but i am desperate for some more chocos.. i may have to wait till april to get some but they will be alot smaller than mine.. i was thinking of attempting to breed a bleheri of similar size with my choco bleheri but have decided not to as i dont think its right..