So I have a 30 gallon reef tank with a current stocking of 2 ocelaris, a Royal gramma, cleaner shrimp, and a goby pistol shrimp pair. I noticed that my zoas are getting eaten up by the little sea slugs, and I have removed a few manually myself. I will be soon getting some sort of dipping chemical, which comes tommy question, which one should I get? And for the second part, I want to know the best wrasse to fit in my tank. I don't want a Six line wrasse, but I heard the Possum wrasse is good, but might not eat them. Any suggestions?