Applied Biochemists Pooltrine 60 is a concentrated, non-foaming polymer algaecide that will quickly eliminate all types of green algae in your pool. Its formula allows you to use your pool immediately after treatment, and will not clog your pool filter. It even allows you to safely swim immediately after usage! Best of all, Pooltrine 60 is made by Applied Biochemists, a leader in bio-based pool chemicals, allowing you to buy with confidence.