Polymer algaecide and copper complex. Formulated to eliminate the toughest strains of algae. Applications Clean filter as necessary Balance pH between 7.2 and 7.4 Apply to pool 1 pound of ProTeam® Quick Shock per 10,000 gallons, wait 2 hours To remove visible algae growth, add an initial dose of 16 to 24 fl. oz. per 10,000 gallons Algae occurring in deep cracks or crevices may require additional scrubbing and vacuuming Continuously circulate water during treatment