dwc hydropoinc system kit (4) mr. stacky change the way you grow with our 5 bucket deep water culture kit. deep water culture (dwc) is a hydroponic, and so also aquaponic, method of plant production by means of suspending the plant roots in a solution of nutrient-rich, oxygenated water. this kit includes: (4) 16 gallon grow buckets (1) nutrient reservoir (2) bottles of nutrient (1) air pump with 4 air stones clay pebble medium rock wool starter cubes air tubes