1 night (about 10 hours) after adding borates via 6 boxes of Borax and 2 gallons of muriatic acid (borates were at 15 when I started), test numbers were borates 50, FC 3, TA 70, pH 7.8.
Two nights and one day later (about 36 hours after pool got used some yesterday), test numbers are borates 50, FC 3.5, TA 80 and pH 7.0 or under, as in "off the chart" low. Will aerate today.
Water felt cold to me after work yesterday. We need to get in the habit of putting solar blanket on on at end of day.