Aquascape Fountain Scale Free safely eliminates calcium buildup from water features, helping to maintain the beauty of fountains. Aquascape Fountain Scale Free is specially formulated to help keep your fountain surface clear of hard water deposits and white scale while adding the fresh scent of lavender. Fountain Scale Free 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 and the full bottle treats 500 gallons of water.