The Autopot Aquaplate Circle Kit contains everything you need to grow without substrate in your Autopot irrigation system. The AQUAplate kit allows you to provide plants with direct access to nutrient-rich water, resulting in faster and stronger root growth. Easy to assemble and insert into the Autopot tray, saving time and money. Recommended water temperature: 64-68 °F / 18-20 °C. Optimize growth by adding an air stone to the tank!