I did quite possibly the dumbest thing I have ever done (the list is long). I bought two red headed gobies and a neon goby from the LFS today. Checked them out in the store and they all looked fat and happy. Came home and released them into my tank and all three have ich. I guess I didn't see the ich under the store PCs, but my halides sure make them obvious. So I have two clowns and a blenny in my display. I layed a fish trap to catch them. Should I now QT all my fish or just the new ones? What is the best treatment for ich?