Marineland NJ1800 Maxi-Jet Submersible Utility Pump, 38-Watt, 474 GPH 474GPH Engineered to handle the capacities of our new Deep Dimension, Corner-Flo Aquariums and our High-Capacity Acrylic Sump Filtration Systems Theyre also more than a match for other brands of aquariums and sumps High-efficiency, flow adjustable marine Engineered to handle the capacities of our new Deep Dimension, Corner-Flo Aquariums and our High-Capacity Acrylic Sump Filtration Systems Theyre also more than a match for other brands of aquariums and sumps