I'm getting ready to convert to SWG. Reading the online manual for the Aqua Trol http://www.goldlinecontrols.com/Support ... 16G_SS.pdf it says you need a level of CH above 200ppm. They have a formula for "Saturation Index" that makes this CH level important. What about this with a vinyl pool? Currently my CH is 100 or less. Pool Calculator.com says I'll need to add about 20# of calcium chloride. Is this really a concern for a vinyl SWG pool?
Sorry to be dense, the manual says do it, but I gotta ask since it is contrary to most vinyl pool info.