I setup in my first reef tank about 2 moths ago. It is a 20 gallon tank. I had a briopsis outbreak and am using FluxRX now. The Inhabitians are: 4 blue legged hermit crabs, a Royal gramma, six line wrasse, Blue sponge on live rock and a Small Coral beauty. All the fish look healthy and eat well. Any suggestions what else I should add?. What soft corals should I get first?