Pond Boss Forums MANAGING AN EXISTING POND Evaluating and adjusting fish populations Sick Trout and Fish ID

Stop feeding for a week to two weeks see if there is a change when you start feeding again. i.e. if the fish that have the problem aren't visible until you feed, then you should be able to see if there is a difference. Or if you can see the fish with the problems, see if the problems go away once you stop feeding.