Circulation plays an extremely important role in an aquatic environment. The Seio Super Flow Pumps deliver high-volume water outputs at an affordable price. These pumps are energy efficient, put out very low 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 love you for the addition of these pumps. SEIO-820 Specifications: - Flow Rate: 820gph - Power Consumption: 18W - Dimensions (H x W x D): 6" x 2.375" x 2.875"