ProTeam pH Up increases the pH of pool water to attain proper balance. This product protects metal fixtures and parts from corrosion. Sanitizers work most efficiently when pH is kept in proper range. Therefore a properly balanced pool will require less sanitizer and less maintenance. Keeping your pool balanced is an important step in getting the most out of and preserving the life of pool and spa equipment. Best of all, pH Up is made right here in the USA to ensure the highest quality, allowing you to buy with confidence.