Nice tank. Do you see any aggression among the aros? I just bought an RTG (about 4.5") and all there was about 6 of them in the tank at LFS. They seemed to be fighting so much. All of them had torn fins and I was able to see the aggression myself. It made me think that it would be impossible to have multiple aros in my tank. That tank was big enough (I think about 5 X 1.5 X 2.5) considering the size of the aros. What is the size of your tank?