The MiniWarden, a low cost Residential/Commercial ORP-pH chemical automation system with temperature monitoring that has two selectable modes of operation, Simple & Advanced. The Simple Mode works off easy to use cycle times and selectable ORP & pH spreads to simplify proportional feed. The Advanced Mode allows for extremely precise chemical feed much like expensive pulse feeders for those situations that require more specific feed cycles. Choose between acid and base feed as well as ORP dry contact or 110VAC to accommodate and feed system including salt systems. A gold ORP sensor can be added when using salt or liquid chlorine. pH can be adjusted with acid, base or CO2. When in Advanced Mode, the effects of acid feed on lowering alkalinity can be minimized with the precision programming. Monitoring the Langelier Index by inputting alkalinity and hardness. It can be used with Chlorine or Bromine.