I love the fish you have, but you are really overstocked when these guys grow up. You would need a 350 gallon at least for the fish you currently have. The next Undy you get will be no different from the first one, IMO the Undy is the most aggressive fish in the trade, hopefully you can tell by my avatar, I know this fish. He will eventually kill most of those fish including the Fimby if he wants too. The Blue Line, and the Clown are not a whole lot better, not to even mention the Fimby, whom kills for territory, not just for food.