I added some ottos to my tank last weekend and I think one may have ich. There's only one spot on it's dorsal, and so far no one else shows any signs, so I'm not panicked, yet. I add salt to my water as a precautionary thing on a regular basis, so I probably don't want to go adding any more. I just wondered, if I have to treat the tank, how will the medication effect the snail? I have Quick Cure on hand, but can pick up something else if needed.