I finally got my pool water tested again. Here are the findings from ALEX:
Total Chlorine/Free Chlorine: 0
Ph: < 6.2
Adj. TA: 35
Total Hardness: 84
Water is crystal clear. No black or mustard algae or slime/mold. Sand filter changed on 6/30/12. Water looks/feels good. I don't wish to use expensive pool store chemicals such as Balance Pak 100 (they said I need 58 pounds @ $18.15 per). Instead, I'm thinking I can drive up TA and Ph with 20 mule team borax and/or baking soda. In fact, I slurried 12 pounds of borax in a bucket and put that in the pool earlier today. Any thoughts on what next?