AquascapePRO Waterfall& Rock Cleaner quickly dissolves debris from water falls, streams and rocks on contact, significantly reducing pond maintenance. Simply sprinkle the treatment directed on the affected area and watch the debris disappear. This treatment will allow you to spend more time enjoying your water feature and less time maintaining it. Waterfall & Rock Cleaner is able to be used at any water temperature, making it an excellent choice for any time of year. The 9 pound container will treat up to 3,650 square feet of surface. Aquascape is passionate about the products we produce, providing unique products, designs, and features that stand above the competition.