With a six-gallon reservoir, the CocoGrower is excellent for raising large specimens like tomatoes. A two-gallon organic CocoGrower Liner (included and also available separately) sets inside the plastic reservoir to support the plant and included clay pellet growing medium, while a drip ring continuously supplies water and nutrients. Measuring 15" tall with a 12" diameter, this system comes with an air pump, tubing, pumping column and drain level tube in addition to clay pebble growing medium and Flora nutrients.