Seachem NeoPlex

NeoPlex is a broad spectrum antibiotic effective against most external infections of both marine and freshwater fish. Used as directed, NeoPlex will not discolor the water or damage the filter bed.
It is well tolerated by invertebrates, although delicate species may be stressed

Be aware that many diseases and infections share similar physical and behavioral symptoms, e.g. clamped fins, Bacterial lesions, Bloat, Mouth Road