Quickly rids pools of resistant strands of algae, regardless of color or type with a powerful one-two punch. Polymer algaecide blended with copper complex, with additional clarifiers added to speed pool recovery. Unique blended broad spectrum algaecide contains an ideal amount of heavily chelated copper, non-foaming, pH neutral, will destroy all resistant strains of algae, including black. Apply product when pool is not in use and with pump running. To remove visible algae growth add an initial dose of 18 to 24 oz. per 10,000 gallons of water. Immediately add chlorine to the bring the chlorine level up to 10 ppm, use liquid sodium hypochlorite or calcium hypochlorite. Algae occurring in deep cracks or crevices may require additional scrubbing and vacuuming.