TotalPond Pond Blue enhances the visual perception and aesthetic quality of the pond and water garden, The use of Pond Blue provides the pond owner the ability to safely create a beautiful pond oasis while helping to prevent predation from birds or mammals and providing an effective UV (ultraviolet light) blocker for healthier water and fish, TotalPond Pond Blue is an environmentally safe product, When used as directed, this product is a fish, plant, domestic and wildlife animal safe product, Treats up to 4,000 gallons, SKU: ATD01A20017X