Well, right now we have a false percula and a GSM living in a 210 (no anemone yet). We had been told by LFS that in that size tank, we could have more than one pair. They have been in there about 2 months, no signs of aggession, they swim together with everyone else, eat together, everything seems fine. I planned to get each of them a friend of the same species eventually. But, I keep reading all of the posts about how poorly the different species get along, and how territorial they are. Since they get along so well, is there a chance that pairs would get along as well, or is that when the fighting starts?