Aqua Wham-O - Pool Algicide 50% 1LThe Aqua Pool Wham O Pool Algicide 50% 1L is a liquid algaecide for swimming pools that is 50% concentrated and non foaming. It is an effective tool for controlling the growth of green, mustard, and other types of algae. It provides reliable protection against common pool algae that can affect swimming pool sanitation. Aqua Wham O 50% Polyquat 1L 50% Concentrated Non Foaming