The recirculating deep water culture (rdwc) system grow kit makes growing with hydroponics easy. Large 5 gallon square grow sites with 4 inch wide lip net pots are great for tomatoes, peppers, peas, beans and other vining crops. The super quiet air pump with 4 port manifold supplies air using separate lines to individual air stones in each grow site providing oxygenated water for optimal root health and faster, healthier growth. Four grow buckets are connected to a common reservoir bucket making top-up and nutrient balancing easy.Recirculating pump circulates nutrient rich water continuously through the system. Adjustable water level control spout maintains constant water depth in grow sites. Easy setup with pre-drilled buckets, high quality 2 fittings with large rubber seals ensure high water flow. Wide lip net pots provide greater stability as plant grows and increases in weight. Large box tube wrench provided for assembly. A separate drain pump and pipe is provided for easy draining of system when necessary. System includes: 4 black 5 gallon square grow sites, 4 grow site lids with a 4 hole, 4 wide lip net pots, 1 black 5 gallon square reservoir with lid, 15 l/min 110v ac air pump, 4 air stones, 40' black air tubing, 3 straight pipe assemblies. 2 right angle pipe assemblies, adjustable water level control spout, 3l clay pebbles, recirculating pump, drain pump, box wrench tool for assembly.