Multipurpose underwater netting protects submerged plants and pumps Protect tender water lily shoots at the beginning of the growing season Use as a coarse pre-filter to prevent large debris from damaging pumps Maintain optimum pump performance by preventing clogs. Mesh netting keeps pump intake free of leaves and other large debris. Handy protective netting can also be placed over submerged plants to prevent damage from hungry koi. Flotation ring prevents netting from falling over submerged plants or pumps. Please click on "More Information" for additional information.