The Autopot has the unique AQUAvalve, which is designed to allow the plant to stay well nourished and watered through its life cycle. The Autopot Pot System is easily extended so many pots can be linked to a single tank. The pots & trays can be easily moved at will, if the plants grow too large they can be spaced further apart with ease. Once set up and a tank is filled with water and nutrient, the system will completely take care of all your plants needs. All you need to do is remember to fill up your tank from time to time.