The Recirculating Deep Water Culture RDWC System Grow Kit makes growing with hydroponics easy. Large 5 gallon square grow sites with 4" wide lip net pots are great for tomatoes, peppers, peas, beans and other crops. The super quiet air pump with 4 port manifold supplies air using separate air lines to individual air stones in each grow site providing oxygenated water for optimal root health and faster, healthier growth. The four grow sites 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 reducing frequency of top-ups. 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 (please note air pump model supplied may differ from picture shown based on availability at time of order, all variations are the same specifications just different manufacturer), 4 air stones, 30' 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. No glue or other tools required.