Agrowtek GrowControl MDX AgrowDose Mini Dosing Controller System With Mounting Panel, Dual Peristaltic Pumps & Temperature, pH, EC, ORP SensorsBuilt On A Decade Of Proven Technology & Components With New, Enhanced Capabilities To Meet The Growing Demand For Highly Reliable Autonomous Dosing Applications The MDX dosing system is designed to automatically dose nutrients, pH and ORP (optional) buffers into recirculating systems and stock tanks to maintain target levels. The MDX system operates independently of other systems and doses on demand automatically according to target set points and