I felt bad for a red devil at my LFS I think she may be a pure rd but anyways she is 6 inches long in a 5 gallon tank over there and she has parasites fungus hole in the head fin rot and pop eye so I bought her to try to save her so I bought some epsion salt stress coat and life guard and lowered the tanks temp to 76 so should this work to help her heal and could she still be OK with one eye :-(