The 16 lbs pH Up Pouch is a specialized pool chemical designed to effectively raise the pH level of your pool water. Each pouch contains 16 lbs of pH increaser to create a balanced and safe swimming environment. Maintaining pH levels between 7.2 and 7.6 ensures optimal sanitizer effectiveness, enhances swimmer comfort, and prevents issues such as corrosion, staining, and irritation. 2 pouches per case.