Our Fountain Fresh Water Clarifier will keep your water feature beautiful and free from surface stains, algae, and green water. This water clarifier is perfect for keeping fountains, ponds, waterfalls, and self-contained water features sparkling for maximum enjoyment. Safe and non-toxic for humans, pets, fish, birds, and pond life. Regular use will promote a clean and clear fountain all year long. 200-gram bottle. Offers a 40-week supply; enough for 20 treatments.