Thanks Waterbear. I suspected at least one of the stores was off when he said the water was acidic based on my "low" TA, yet my pH was fine (actually a touch at the high-end with 7.8).

I have a salt water system. Salt reading is currently 2900 and I have the system set to 20% chlorine generation. I use a powdered acid (ph Down) when I need to bring pH down (it does tend to creep up, albeit slowly). My FC was about 2 when the samples were taken Saturday.