Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Coppers - Sulfate and Chelated together

JMAC I have used all of those with the same result. Limited control of pondweed. Aquathol has worked the best of the group. Like you I don't want to kill all or even most of the pondweed because of its positive effects on fish. I think if one wanted to get rid of it a systemic herbicide (sonar or the like) would be necessary.