Pond Boss Forums MANAGING AN EXISTING POND Evaluating and adjusting fish populations Advice For Marking Fish?

Dave - The perch that I'm marking are pellet trained and full thrust from the caudal fin is not as impt as if these tail clipped fish had to be competitive as full time canibals. We frequently have an occasional deformed fish that survives and grows well by thriving on the pelleted food welfare. I would like to track these perch's growth for 3 to five years. I will try the spine nipping technique. Thanks to all responders for all the advice and experience.