Potassium monopersulfate oxidizes water to remove contaminants and protect key chemical levels (chlorine, pH, alkalinity, hardness).
Best Ever
"This is the best and easiest product I have found to keep my pool in excellent condition This is my 2nd season using this and I will never go back to constantly buying chemicals. My pool is clean and clear all season. You will not regret using this. Simple, economical, and just a fabulous product!"

