The Waterfarm Controller Kit takes advantage of General Hydroponics' top feed modular Waterfarm system design. One Waterfarm Controller with eight Waterfarm modules are included with each kit. Also included are air pumps, tubing and necessary irrigation fittings, and Flora Series nutrients.  This is a very popular do-it-yourself system design now available to the grower that wants to spend their time tending the garden as opposed to fabricating a water-tight hydroponic system. Media is purchased separately.