(3 pack) HTH Algae Guard Advanced — Liquid, 28 fl oz — Pool Algaecide Compatible with All Pool Types

5-IN-1 ACTION Kills and prevents green, black and mustard algae. Non-foaming, Fast Acting Destroys and prevents all types of algae. Swim immediately. Compatible with all swimming pools Great for opening and closing your pool. Liquid Algaecide in 28 oz. bottle