Retest on 6/20 (am) after adding 1 box borax the previous evening:
FC: 13.0 ppm
CC: 0 ppm
ph: 7.9
TA: 80 During this test the sample turned green and then to yellow vs. red
CH: 200 The sample was "pink" rather than red
CYA: 80 I'm a little confised about what "disappears from view means. I assume that if I can see the dot at all it has not "disappeared from view".

Today the pool has never looked better.

Still trying to determine if the sand (which I'm sure is coming from the pool finish) is the result of low ph etching the surface or if the pool just needs to be re-finished. (not sure when the current finish was applied - at least 5 years)

I am brushing a couple of times a day so hopefully the accumulation of sand will stop with the right ph.