A bio-enzymatic product by Microbe-lift specially formulated for use on large fountains or waterfalls. Prevents organic contaminants from forming. Treats up to 6400 gallons per 16 oz. This product uses two unique, proprietary technologies to prevent organic contaminants from forming. Will help ensure clear, sparkling water that keeps water filters and pumps free from organic debris. Safe for birds, fish, aquatic wildlife (fish, frogs), humans, pets, aquatic plants and lawns. All natural ingredients, biodegradable and nontoxic.