In lakes, when used according to the label, are not toxic to fish. In ponds, the products used will generally hurt fish, but the rapid plant decay can lower oxygen in the water. Treating ½ the pond at a time will help keep the oxygen level remain safe for fish. Certain fish like Koy may be more sensitive to Cutrine Plus and copper sulfate.
Can these products be used if fish are present?
by Craig | Jan 1, 2016