Buy Supplies Seeds Rock Wool Clay Pebbles 2″ Net Cups Trays Lights Nutrients Hydroponic System 1 Tub  3/4″ PVC pipe (140 inches) 3/4″ PVC couplers Water Pump Spray Noslls Tools Needed 2″ hole cutter No. 25 tap PVC cutter Drill Plant Seeds First, place the rock wool into a tray. Next you will want to […]