Algae Defense 60 is a highly concentrated algae preventative that works to combat all algae types in any type of pool. Clean filter as needed and adjust water balance. For best performance pH should range between 7.2 and 7.6. Initial treatment is 6 to 11 ounces per 10,000 gallons of pool water. For a maintenance dose add 2-4 ounces per 10,000 gallons of pool water weekly. For pools with light algae growth add 11-17 ounces per 10,000 gallons.