Pond Boss Forums INTRO Questions & Observations Fin Rot?

Fish that are stressed can be more susceptible to disease and sickness such as the Fin Rot that you are seeing. Stressors are things like evading predators, poor water quality, etc.

In one clients 7/8 ac pond that had 3-5 cormorants on it every day, over 80% of the fish that were caught during a fish survey had marks on them from escaping being eaten by the cormorants.

I think that if you reduce the stress on the fish the problem will fix itself.