Pond Boss Forums GENERAL QUESTIONS Help Pond Pests

Pondowners w/ herons - They are not huge fish eaters compared to cormorants but they eat their share of fish. I've got copies of pictures of one eating a 13"-14" bass. My main problem with them and other fish eating birds is they are intermediate hosts for numerous fish parasites and their manure or regurgation contains stages of fish parasites that are planted or seeded into your pond. The longer they are there and the more of them there are the more parasites they seed in to your system. Snails in the pond are a common host that help complete numerous parasite life cycles that infect fish.