The base unit is first put in place, a new lining added with an inch of sand on top. The warming cable and rod thermostat are placed on the sand, then covered with more sand. The misting unit with the solenoid valve and electronic leaf controller are then placed on the sand. The electrics and water are reconnected and the cover put in place. For Ali, who propagates the plants, this new mist unit is a thing of beauty, thank you so much Kieron.