CrystalClear RapiClear is designed to clear cloudy, muddled pond water quickly, unusually within 1-3 hours depending on the size of the pond. RapiClear will quickly restore pond water to a brilliant shine. The unique properties allow suspended particles in water to attract together and fall to the bottom of the pond where they can be vacuumed out or removed by filtration for a clean pond fast. Apply 1-ounce for every 500 gallons up to every 3 days until water is clear.