Crystal Blue 222 Copper Sulfate Algaecide, Solid, Spray Application, 15 lb Package paint--05-29-26 Cut Type: Double Cut

Cut Type: Double Cut

Approved for direct burial in earth and concrete

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Crystal Blue 222 Copper Sulfate Algaecide, Solid, Spray Application, 15 lb Package paint--05-29-26 Cut Type: Double CutAbout This Product Crystal Blue copper sulfate is a great pond algae control product for filamentous or string algae. Copper sulfate should be used as a pond algae treatment on actively growing algae in water temperature above 60 deg F. When getting rid of algae in a pond, it is always important to treat 1 2 of the pond algae at a time to avoid killing too much algae and depleting the water of oxygen. Copper sulfate is safe for most varieties of fish