Well I started out setting up 10 gallon FO tanks so I have a lot of Damsel exerence. At one point I had 2 green chromis, 1 blue reef chromis, 1 yellow tail, 1 three stripe, 1 domino and 1 clarkii clown with a penguin 125 in a ten gallon tank. The only thing about that was I had to change about a...