Regal 25 Lbs. Alkalinity Plus PSC10-RG provides everything a pool owner needs to revitalize and maintain their backyard oasis. Our stabilized sanitizers, shock treatments, and professional-grade algaecides transform laborious pool care into a simple process. With a wealth of top-of-the-line products, Regal minimizes pool maintenance time and maximizes your pool time fun. Easy-to-use, this granular product raises total alkalinity in the pool and acts as a buffer to prevent pH bounce, staining, and corrosion. Features: Raises Total Alkalinity in Water Contributes to Optimal Sanitizer Performance Protects Pool Surfaces from Staining and Corrosion Helps Prevent pH Fluctuation