Pondmaster® Pond-Mag® 02525 PM 500 Series Magnetic Drive Water Pump 500 GPH Pondmaster Pond-Mag® 250 to 3600 Series Pomps have been designed to handle virtually any application where water has to be moved. They've been fulfilling the needs of professionals and consumers for decades with quiet, efficient and reliable 24/7 performance. They feature a magnet impeller assembly and an epoxy encased power unit ensuring that water never gets contaminated with harmful oils or chemicals. Pondmaster Pond-Mag® pumps are perfect for all pond environments