Initial treatment: add 6-11 oz. per 10,000 gallons of pool water, weekly 2-4 oz. per 10,000 gallons. A specialty blend of polymeric highly concentrated algaecide effective against all types of algae. Will not upset water, pH neutral, contains no metals, non-foaming. Not affected by elevated levels of sanitizer in water. Consistent use can reduce the amount of sanitizer normally required. Ideal for pools with attached spa or water features. Effective in a wide pH range. For best performance pH should range between 7.2 and 7.6.