SR Aquaristik Aquarium Mag Drive Submersible Water Pump 1500GPH/5678LPH Extremely energy-efficient, saving hundreds of dollars over running traditional water pumps Magnetically driven or "mag" drive motor technology is simple & easy to maintain Durable pre-filter cage & sponge protects pump & also reduces pump maintenance Oil-free design prevents aquarium contamination Provides years of trouble-free operation