This formulation combines a powerful clarifier, sequestrant, chelating agent and flocculent in one. The Sapphire Stuff helps prevent scaling, staining, scum line buildup and foaming in swimming pools and spas. It requires no premixing, will not affect pH and is compatible with all swimming pool sanitizer systems. The Sapphire Stuff removes oils, soaps, metals, cosmetics and other particulate matter that can cause staining, cloudy water and discoloration in swimming pools and spas.