VIVOSUN DWC Hydroponics Grow System with Top Drip Kit, 5-Gallon Deep Water Culture, Recirculating Drip Garden System with Multi-Purpose Air Hose, Air Pump, and Air Stone (1 Bucket + Top Drip Kit) Item Description DWC Bucket +Top Drip Kit: Upgraded DWC hydroponic planting system adopts an unique top drip irrigation design; It provides a water circulation to keep the nutrient water fresher and easier to be absorbed Powerful Air Pump: Air output: 7 L/min; Voltage: 110-120V/60HZ; Power: 8W; The air pump and air stone provide sufficient air bubbles for each barrel through the air hose, which can promote the growth of plant roots effectively Grow Faster, Harvest More: The upgraded DWC system enables plants to grow faster and produce higher yields; just plug in the air pump and the DWC system will run automatically Complete DWC Hydroponic Kit: This hydroponics kit contains 1x 5-gallon PP plant bucket; 1x 8-inch grow basket; 1x drip irrigation set; 1x air pump; 2m air tube; 1x air stone; 1 x clay pebbles pack; 1x visual water level indicator; 1x valve connection; 1x instruction booklet Wide Range of Applications: This complete hydroponic bucket system easily fits in grow tents, open areas in gardens, balconies, or offices, homes; Ideal for planting vegetables, fruits, flowers, and crops Yes, the product uses an air pump to move the water for both the air stone and the drip ring. At least 8W for the single bucket, and at least 15W for 4 buckets. We provide a installation video on the detailed page, and you can also refer to the instruction manual. Yes, you can cap off 2 air lines for each unused bucket. It has 8 air lines 2 for each bucket. Payment We accept payment only through PAYPAL Shipping We ship products worldwide through standard express courier service, it will reach within 7 to 10 days to abroad buyers, we ship the product after recieved clear payment and give full information about shipment to the buyer Return We accept product return 25 days from delivery date but product should be in original condition.