The double-tray Autopot® Complete is a hassle-free, self-watering planter system fit for both soil and hydroponics applications. It features a simple gravity-fed design so no electricity, pumps or timers are required for operation. The Autopot system includes two, ten-inch pots that sit inside a provided tray assembly. This tray also houses the so-called Smartvalve which accurately controls the flow of nutrient solution to the individual plant sites as needed. Growers just connect the Smartvalve unit to the included 14-gallon master reservoir and keep the reservoir level to or higher than the Autopot module for proper functioning. Reservoir (18"x13.5"x13") can supply up to four modules that can stay hydrated for weeks before a refill is needed.