Aquascape Algaecide is an effective liquid algae control solution that battles and stops algae growth in ponds, waterfalls, and fountains. It eliminates the growth of string algae and single-celled floating algae, also known as green water. This algaecide greatly reduces pond and fountain maintenance, maximizing your time spent enjoying the water features. One teaspoon of Aquascape Algaecide will treat up to 50 gallons of water, making application easy and precise. Safe to use in ponds with fish and plants.