Every day thousands upon thousands of facilities across the country depend upon their chemistry controllers to keep their pools and spas in line. Yet despite the staggering number of devices out in the field, multiple control types and myriad of options on the market, there still seems to be a pervasive misunderstanding about just how “auto” these pieces of equipment are and what to expect from each of them. http://tmiaquatics.com/how-automatic-are-chemistry-controllers-a-comparison-of-the-technologies/   By: TMI Sustainable Aquatics