Pond Pulse 3,000 GPH Hybrid Drive Submersible Pump Up To 3,000 GPH Max Flow High flow, energy efficient hybrid drive technology combines the high flow characteristics of a direct drive pump with the energy saving efficiency of a mag drive pump. Upright design with space-saving footprint makes this pump ideal for skimmer and pondless waterfall installations. Intake screen prevents clogging while passing solids up to .25 inch. Asynchronous drive motor can be controlled with variable speed controller (not included) that permits you to increase or decrease pump flow as needed Impeller passes solids to .25. Engineered for 24-hour continuous use; overload sensor prevents burnout Contains no oil; completely safe for fish, wildlife and aquatic plants. 2-year manufacturers warranty.