Tsunami aerator pumps will perform up to their legendary name for Aerating water! These Colour coded aerator?s have interchangeable replacement cartridges to make carrying spares simple, easy and cost effective. Each pump comes loaded with features such as Tinned and Caulked lead wires, Anti-Airlock vanes, Threaded Outlet with barbed fittings, Water cooled motor housing, Glass and mineral filled polymer body, and a Three Year Warranty to top it off. Red = 600 GPH, Blue = 800 GPH, Grey = 1200 GPH