Keep fountains pristine with Aquascape Prevent for Fountains. Our specially formulated blend of clarifiers helps reduce maintenance needs and unsightly fountain conditions, such as foam, debris, and white-scale buildup. The 8-ounce bottle treats up to 5,000 gallons, with a pump top that accurately measures 100 gallons of treatment per pump. Plus, Prevent for Fountains is safe for birds and other animals to drink from. Not safe for fish.