ProTeam Supreme Plus is an enhancer that reduces eye and skin irritation, controls algae, and improves filtration. This product was reformulated to be more effective than the original Supreme and it is pH neutral. 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 water balanced will not only create more comfortable water for swimmers, but will help extend the life of your pool or spa equipment. Best of all, Supreme Plus is made right here in the USA for the highest possible quality, allowing you to buy with confidence.