This liquid formulation contains the "good" bacteria that is necessary for the nitrogen cycle. These non-pathogenic bacteria will consume nutrients that cause excess algae and restores water purity. Highly recommended to be used to seed a new biological pool filter. Reduces ammonia and nitrite levels. Beautifies ponds, improves clarity, reduces organic sediment and is beneficial to fish and wildlife in ponds. Use routinely in the water garden pool, pond or indoor aquarium to keep the water clear. Begin with one ounce per week to treat water garden pools up to 2500 gallon and after one month reduce to twice per month or as needed. Treats water garden pools and large or small ponds!