Experience the freedom of non-chlorine shock with O2 Shock, the powerful oxidizer that eliminates organic contaminants without harsh chlorine odor or long wait times. Traditional chlorine shock requires hours of waiting before swimming, but this potassium monopersulfate formula allows you to shock your pool and swim within just 15 minutes. It effectively removes swimmer waste, cosmetics, oils, and other organic materials that cloud water and reduce sanitizer effectiveness. Ideal for pools using alternative sanitizers like biguanide or mineral systems, and perfect for pool owners sensitive to chlorine. One pound treats typical residential pools, providing the oxidation benefits of shock without the drawbacks of chlorine.