The PowerGrower eco replaces the older model PowerGrower. The unique hexagonal design enables you to Pack many PowerGrower ECOS together with close spacing for large installations. The PowerGrower eco will grow small, medium, & Large plantsup to tomato, cucumber & pepper size. It is fully compatible with the controller systems. The PowerGrower eco Complete comes with: 5.7 gallon reservoir, 3 gallon growing chamber, pumping column, Column support tube, drip ring, 1/2" Grommet, drain level tube, air pump, 9 L of Hydroton rocks & 3 Part Flora series nutrients.