Circulation is extremely important in an aquatic environment. The Seio Super Flow Pumps deliver high-volume water outputs at affordable prices. These pumps are energy efficient, put out minimal heat and provide very high-volume and well-dispersed water flow: These features help to keep electric bills low, while adding the needed flow to your tank. Additional features include ceramic shafts and durable high-impact plastic impellers that make these pumps reliable and long-lasting. The fully submersible Seio Super Flow Pumps can be used in both fresh and marine water environments. Your current-loving fish, corals and invertebrates will appreciate the addition of these pumps.The SEIO 1500 will cirulat 1500 gph.