Use a net to keep leaves from falling into pond water. A net stretched across the pond surface requires daily emptying when leaves are falling thickest. A pond shelter type kit supports netting on a frame that prevents leaves from ever touching the water. An elevated net is also easier to keep free of leaves. If leaves do land in water, scoop them out. Also keep the skimmer basket emptied of leaves. Decomposing leaves in a pond release materials that can harm fish and muddy the water.