The Powergrower 8 pack includes: Reservoir and controller (17 gallons) with lids and a hatch cover 8 Individual hexagonal growing units (individual reservoir (4 gallon) and growth chamber) 8 Drip rings and pumping columns 1 Dual Diaphragm Air Pump with sufficient air-line tubing Plumbing, including tubing, tees, float valves and grommet This system does not include the Hydroton rocks. Two bags of 50l Hydroton rocks are required for this system.