Natural Chemistry 3500 Clear and Perfect Pool Water Clarifier, 1 Quart Clarifier that is specifically designed to work in the pool water environment Contains engineered multiple polymers that work on the billions of other substances found in pool water Ultimate 6-in-1 Clarifier The six features are agglomeration, coagulation, flocculation, adhesion, compaction and neutralization Recommended dosage- 1-ounce per 4000-gallon (for trouble pools), 1-ounce per 6000-gallon weekly