I currently have 6 demasoni in my 56 gallon column along with other types of cichlids. Soon I will be giving away everything but my demasoni. I'd like to stock them exclusively but I know that there should only be 1 or 2 males with the rest obviously being female. So I'd like to know how to determine the sex. Also I'd like to know how many should be stocked and if the normal "overstocking" cichlids rule should apply to cut down aggression? Pics of my tank & rock work can be found on my profile. Any suggestions would be appreciated.