Gardeners can get aggressive growth rates with the power of aeroponicsand the Aerojet expandable hydrogardens. Microjets spray plant roots with nutrient solution while simultaneously delivering high levels of oxygen,creating an ideal growing environment. Mist settings can be switched from continuous to periodic bursts of one- minute -on and four- minutes- off. Every system comes with six, four inch net pots for each tray. The six tray Aerojet system has a 20- gallon reservoir and 550 GPH pump.