Something to fix damaged fins?

[ILIKECOUGARS]

I would use Melafix.
Melafix is an all-natural medication derived from the leaves of "melaleuca," the scientific name for the tea tree. The healing properties of tea tree extract has been known for centuries. University studies and extensive laboratory tests showed that melafix is an effective bacterial remedy for freshwater and marine fish. Melafix also caused rapid repair of damaged fish tissue and fins. New growth was seen in as little as four days of treatment.