Treatment for killing floating, submerged and planktonic algae in ponds/lakes. Spring application. Algae forming on the bottom of pond and water temperature above 60 deg. 30 day residual suspension using stabitrol technology to aid in control of algae. Do not treat more than 1/4 to 1/3 of the surface area of pond at one time to avoid oxygen depletion due to vegetation death. Wait seven to ten days between treatments. Re-treatment during season will be needed. Treat when algae is in early stages. 100% safe for water use immediately.