"Clorox® Pool&Spa™ pH Up raises low pH in your pool so you can maintain a beautiful, swim-ready pool. The granulated formula dissolves fast, and the easy pour application bag makes raising your pH simple, and fast. Low pH in your pool can cause red, irritated eyes and expensive corrosion damage to your pool equipment. Use this pH increaser as needed to achieve a suitable range of 7.2 to 7.6 to keep your water swim-ready and clear. Intended for use in both traditional chlorine and salt chlorine pools. Test and balance your pool weekly with the Clorox Pool app to maintain clear water, longer lasting equipment, and comfortable swimming. Maintaining proper pH of 7.2 to 7.6 is both important and easy. Important, because if pH is too high, chlorine cannot effectively sanitize and disinfect your water and water will irritate your skin and eyes when you swim. If pH is too low, corrosion can occur and the pool water will irritate your skin. "