Aquascape Rock and Fountain Cleaner is the first line of defense to quickly and safely remove debris from waterfalls, streams and fountains, significantly reducing required maintenance. The innovative and easy-to-use spray bottle allows the treatment to be evenly and effortlessly applied to the desired surface for effective spot treatment. Simply halt water flow and apply the treatment to the desired area. The pump can be turned back on after a minimum of 10 to 20 minutes One bottle covers up to 300 square feet. Rock and Fountain Cleaner is safe for fish, plants, pets, and wildlife after use.