Mag-Drive Pumps are specifically designed for statuary, fountains, ponds, and freshwater or saltwater aquariums. It may be used either in-line or submerged. It is extremely energy efficient and is designed to run continuously. The pump consists of a power unit encased in water-proof epoxy which creates a magnetic field. This drives a powerful ceramic magnetic impeller, the only moving part. The pump contains no seals or oil, and therefore is virtually maintenance free. Has a 18 ft power instead of the regular 10 ft cord