Pond Foam Free safely eliminates foam in water features, helping to maintain the beauty of your fountain. Excessive foam typically occurs as a result of a buildup of organics. Aquascape Pond Foam Free is specially formulated to help keep water clear of foam and the treatment is non-toxic, making it safe for birds, fish, plants and animals. The easy-to-use pump top accurately measures 10 gallons of treatment per pump. One full bottle treats 500 gallons of water.