Aquascape Prevent for Fountains and Waterfalls SL prevents unsightly fountain conditions to keep fountains looking clean and clear while reducing maintenance. Prevent for Fountains and Waterfalls SL is available in a 32 oz bottle and designed for use with the Dosing System SL and Automatic Dosing System. The treatment uses a special blend of clarifiers to clear and prevent debris and white-scale buildup in the water and on the surface of the fountain, rocks, or gravel. The formulation also works to prevent stains, foam, and other unsightly water conditions. Prevent for Fountains and Waterfalls SL is safe for birds or animals that may drink from the fountain. Prevent for Fountains and Waterfalls SL is not safe for fountains containing fish.