there are two of each species, all get along. The bigger tomatoe is already dominating and is deff the female. The percs are tank raised so they are very peaceful and neither species bothers the other. In fact they all share the anemones as yall will see in the movie. I'm hoping the clowns will cross breed, since the percs have already bred i know they are mature enough. So no disaster in sight, if anything great things are to come. The tank can be seem in my gallery when 1st set up, to get an idea of its progression. The specs are: 2 65 watt pcs, one 50/50 and one 50/50 actinic. Bout 20-30 lbs of rock, don't remeber exactlly because i work at a lfs and didnt pay to much attention to the rock weight(will next time). There is a tunze nano stream for filtration as seen in the top right of the tank. Protien skimmer is a cpr powered by the rio pump(my favorite small skimmer, i use it on the 12 gallon as well as my 65). As yall can see form the variety of algae, i believe in refugiums and in this case an in tank refugium. Works great and looks great too! Water changes are one a week 5 gallons each. ok that was alot of info.... Any other questions??? Bring em on!!