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The Impulse™ is a quiet, energy-efficient, multi-function pump. It is ideal for fresh and saltwater aquariums, protein skimmers, indoor fountains, water-cooling and all similar submersible and inline applications which require energy efficient, ultra quiet performance. The Impulse™ is equipped with a synchronous motor and an advanced impeller, ceramic shaft and bearings (stainless steel on the Impulse™ 400), and an adjustable flow rate. Multi-size hose adapter fittings and suction cups are included.