Each WaterFarm, PowerGrower and EcoGrower can be used as a stand alone system, or several can be connected together. There is a growing chamber and a nutrient reservoir for each unit. They use an air pump to deliver nutrients and have expanded clay pebbles as the medium.
The Dutch Pot (EuroGrower) is a single chambered system which is drip fed by an in-line pump. Drainage from all units returns to a single reservoir. In the Dutch Pot, smaller grade media such as coco peat may be used without fear of particles entering the nutrient stream and clogging pumps.