I have a 37 galllon tank with a hi fin prawn goby, 6 line wrasse, royal gramma, firefish, and ocellaris clownfish. I know a Leopard Puffer (max size 3 inches) can go in the tank, but I'm not sure if it will get along with everyone. Right now everyone is friends, and hangs out. This puffer is listed as peaceful w/ minimum 30 gallons on liveaquaria... but will it make my tank too crowded? Is it territorial? Is my tank already fully stocked lol. Anyone with experience?