Ok, I acquired a spped stir, one thing it is cool to watch the colors form a waterspout / whirlpool effect of color changes.
c/c < .5 slight tinge of red with speedstir light but not visible without light
TA 90 or 100???
CYA 110 (50% pool water + tap)
So for CYA drop 9 turned it pink, drop 10 turned it bright red. So would TA be 90 or 100?
I am just not sure which drop to count as ''red". CYA I calculate around 110 or so, last week pool store told me < 50. Hmmm.