I have a 29 gallon tank, have 3 green blue chromis and a watchman gobie. I tried to put in two clown fishes and they died. The chromis were put in the tank first and appear to have picked on the clowns. Took 8 days for the first one to die and the other one died the next day. The chromis are almost 2 inches. Thinking about removing the chromis, and adding two clowns and a couple cardinals, then waiting a few weeks and adding a royal gramma. The chromis appear to be running the tank. Will be looking to add light and corals once the tank is older, is two months old. Thsnks