This bucket venturi bubbler system includes: (4) four 5-gallon "blackout-style" buckets with 6 net lids, (4) four 160 gph water pumps, each one with a venturi bubbler kit, starter kits of hydrocorn and rockwool growing mediums & premium nutrients and instructions. The water pumps add oxygen and circulation into the reservoir to circulate the water in the reservoir. As the pump operates it draws in air through a -inch emitter, which provides the benefit of moving around the solution while the air being drawn in increases the level of dissolved oxygen. This allows freshly oxygenated water to be delivered quickly to the roots. This system circulates the nutrient-rich water to help ensure nutrients are constantly maintained at the optimum levels and never get a chance to settle on the bottom. The growth rate on a hydroponic plant is 30-50 percent faster than a soil plant, grown under the same conditions and the yield of the hydroponically grown plant is also greater. Hydroponic plants have fewer problems with bug infestations, fungi and disease so fewer or no pesticides are used on the plants. This item is made of food grade.