Hydrofarm CAPMP026 Ebb and GRO Monster, 530 Gallons Per Hour Submersible Pump 3/4" output and adjustable inlet valve to control water flow rate Will move up to 530 Gallons per hour Can be used for flood and drain, drip aeration and non-recovery systems Pump is oil free to prevent nutrient reservoir contamination and can be completely disassembled for easy cleaning. Comes with 8 foot power cord