Poolife TurboShock (25 lb)Poolife TurboShock is a calcium hypochlorite shock used to combat algae and bacteria growth. This fast dissolving shock keeps pool water clean and clear with less work. Product Dosage 9 16 ounces per 10,000 gallons of water to provide 5 to 10 ppm available chlorine every 7 days. Directions Method for dosing directly into pool: Add the recommended dosage of this product during the evening hours while the filter pump is running. When adding this product