the tang has ick. Is there any treatment that will not hurt the reef. I don’t have a quarantine tank and I read the remedies are not good for the corals. Is that all corals or just sps. I can’t catch the fish he goes in the reef. Please advise. I have some dang Xenia’s, mushrooms, polyps, trumpets, Favia, giant toadstool leather, cinnamon polyps.