Efficient magnetic drive technology supreme aqua-mag 1.9 to 36 Series Pumps have been designed to handle virtually any application where water has to be moved. They have been fulfilling the needs of professionals & hobbyists for over 20 years with efficient, quiet & reliable 24/7 performance. Aqua-Mags are ideal in either saltwater or freshwater environments & Operate equally well in-line or submerged. With only one moving part, a magnetically driven impeller & an epoxy-encased power unit, there’s never a fear that they will contaminate the water with harmful oils or chemicals.