Half Off Ponds Manta 3,300 GPH Magnetic Drive Submersible Pump &ndash; Up to 3,300 GPH Max Flow Extremely energy efficient magnetic drive technology is an ideal choice for fountains, waterfalls and most ponds. 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. Vortex 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.