I noticed in Instars picture gallery photos of more than one copperbanded butterfly per tank. I've seen a tank with 5 peaceful yellow tangs (100 gallon). Both of these tanks were not retailer tanks with a transient population. I realize each tank and fish is defferent but I would like to discover what makes it possible to do these (to me incredible) things? Superior condtions, food, chemistry, habitat etc. or merely putting a group in tank so aggresion is spread evenly or both. Or something else. Any ideas?
Thanks,Tim G