Keeps pool water clear – THE NATURAL WAY! The original Chitosan Clarifier uses high-quality chitosan, which is obtained from the hard outer skeleton of shellfish, including crab, lobster, and shrimp to deliver superior water clarity! This tried-and-true technology doesn't interfere with the performance of other pool products. It even works with high sanitizer levels and can be used at the same time as shocking your pool. Chitosan Clarifier works to improve filter performance while keeping pool water crystal clear! Prevents oil and scum line. Eliminates cloudiness. Use weekly to prevent oil and scum at the water line, eliminate cloudiness and trap metal particles to help improve filter performance. MAIN INGREDIENT: Natural polymer from the chitin in crab shells SHELF LIFE: 5+ years INSTRUCTIONS FOR USE: Dilute Chitosan Clarifier in bucket of water & broadcast around entire pool area area Allow filter to run at least 6 hrs best results. DOSAGES: For weekly maintenance add 2 oz per 10,000 gals of water.