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EcoPlus Adjustable Water Pump 528 GPH prop-media google terra preta and theAdjustable Flow Water Pumps from EcoPlus This line of adjustable water pumps offer an energy efficient magnetic ferrite rotor with a ceramic shaft, vastly improving GPH and head pressure that is needed in hydroponic systems, fountains and more. These pumps are manufactured with a built in flow regulator allowing full adjustability of your water movement. Included with each pump are three sizes of fittings that easily attach to the outside threaded