ProTeam Alkalinity Up boosts the pool's alkalinity level into the optimal 100 to 150 range, virtually eliminating pH bounce to allow you to accurately balance your pool's water chemistry. This will not only improve sanitizer efficiency, but will prevent costly corrosion damage to pool plumbing, surfaces, and equipment. A properly balanced alkalinity level will also give swimmers much more comfortable water with minimal skin or eye irritation. Best of all, this product is made right here in the USA to ensure the highest quality, allowing you to buy with confidence.