Thanks for your input Waterbear. I shocked it yesterday and it was my goal to get it above 20...I think I made it, as I tested it last night and got a reading of 20 but I'm not sure how well circulated the bleach was at that time (the pool had been running 4-5 hours since shock).

By the way, my liner is vinyl so all is well with my calcium.

Again, thanks for your experienced insight.

Rick