@mknauss et all: thank you for all the help. For the first time I have all my pool chemistry in line and pool functioning well. After a week of SLAM, leveling my chemistry and adding boric acid, my downward chlorine drift is much slower and water looks beautiful. Strangely, the recent torrential rains that overtopped the pool twice in one day, helped. It brought down my CYA, CH and borate levels too low, but it also brought down my pesky high TA to normal range. Thus, once I added the right amount of calcium chloride, cyanuric acid and boric acid, it all came together. Other than adding some more DE to the sand filter and some brushing and vacuum, I can enjoy, and take the nominal daily maintenance forward. I'll post a few pics soon. Thanks again!