My 1st post, great site here! New house, 1st time pool owner. Pool info in signature. I have an auto-chlorinater, using 3" tabs. I hired a pool service just to get started (weekly chem only), but plan on doing things myself once educated. What I find odd is they are using Liquid Chlorine (not shutting off my chlorinater). I know Tabs and Liquid effect PH different ways, just wondering if it's OK to use both.... or which is "preferred". Thanks!