Oh, the "ole miracle in the bottle" debate continues. About every week someone posts this question. Only a few people have posted success with this but you need to think about it like this; How can a chemical target one invert and leave your snails and crabs good? It cannot. Hypo or copper is the "ONLY" way to treat Ich. And you cannot do that in the main tank. The infected fish Have to go into QT and it treated for 6-8 weeks.