just gonna use 3 pumps , 1 300gph for the res, 1 200gph to circulate the nutes in the res, and 1 200gph for the controller bucket to pump nutes into the res, and the bubbler part 1 aquarium pump , for airerating the res, and for the float valve in the controller bucket , havent made that yet, and dont really know how, so any feed back on building dwc or bucket systems would be greatly appreciated