I will soon have a new 50K gal plaster pool, and although I will start out feeding chlorine/acid manually, I would like to automate sanitation / pH as much as reasonable. I don't currently plan to use SWG, and have been looking at the peristaltic feed setups. Although I would prefer to automate both ORP and pH, discussion here leads me to believe that ORP automation will require use of significantly more total chlorine due to need to keep CYA below 50, so I am looking at pH first, and perhaps only. I have read the various pump threads, and it seems that the pumps themselves are similar and reasonably reliable, with preventive maintenance. However, I have not seen much discussion of the various controllers. Which brands/models have people had good experience with? (realize this is more typically a commercial item, although not sure why; the Rola-Chem ORP/pH package is ~$1700, which is less than two IC-40 setups running open-loop).
Appreciate any input,