Aquascape Algaecide controls unsightly string algae growth as well as single-celled floating algae, also known as green water. Elimination of algae allows you to spend more time enjoying your pond and less time maintaining it. A teaspoon will treat 50 gallons, making the addition of treatment quick, easy, and precise. Algaecide can be used in ponds with fish and plants. Aquascape is passionate about the products we produce, providing unique products, designs, and features that stand above the competition.