High-efficiency, flow adjustable marine series pumps meet the most demanding requirements of saltwater and freshwater systems. Engineered to handle the capacities of our new deep dimension* corner-flo aquariums and our high-capacity acrylic sump filtration systems. They’re also more than a match for other brands of aquariums and sumps.- compact design optimized for maximum output with low power usage.- quiet operation with little or no heat. Motors self-protected against overheating.- able to run internal/submersible and external.- ul-listed. Truly stated flow rates.- all necessary attachment hardware supplied standard.- standardized npt fittings. Screened intake.