A lot of folks make their own auto temp controllers called heatermeter from a Raspberry Pi computer for not much more than $100. Other go Auber, Pitmasters iQ, Guru, Stoker, etc. I just fill up the ring and get 16+ hrs burn au natural. If you water in the pan you're using a lot of fuel to heat that water.
~ May your glass be ever full. May the roof over your head be always strong. And may you be in heaven half an hour before the devil knows you're dead. ~ Big Deck BBQ and Brew