Hi There…. As AutoPot is bottom fed it is best to turn off the reservoir for 12 hours during this time the tray will become empty ….. once it is pour the solution into the tray ….. not on the AQUAvalve …… leave for an hour or so and then repeat….. just fill up the tray to the level just above the AQUAvalve pipe connection point…..leave tap off for 12 hours and then turn back on …… and repeat as and when required….