Our hippo tang in our 80 gallon tank has a new grayish growth above its eye. This is a veteran fish that has hung in there for eight years without any problems. No recent change of conditions, due for a water change but holding off until I figure out next steps. Water salinity is right in the range. Guy at local aquarium store is recommending treatment with Minn-Fin.
Suggestions? Many thanks!

Suggestions? Many thanks!

