Fountain Fresh all-natural water clarifier contains a unique blend enzymes and extracts to prevent algae growth when used as directed. Use this product to keep water clean and clear while maintaining the life of the water features such as birdbaths, fountains, self-contained water features, and small ponds. It’s an all natural and non-toxic water treatment that will keep water features free from algae growth, green slime, surface staining, and odor. It is not an algaecide so will not remove algae once it has grown. The pod dissolves in warm water and is safe for humans, pets, fish, birds and plants. No scooping or measuring required!