My K-2006 arrived today! I had to fill up the pool with the hose and had a rainstorm last night that added a bit of water. Interesting results from my first test:

7.4 pH
3.5 ppm TC
110 ppm TA
50 ppm CYA

I wasnt expecting these results at all, considering how much water was added after losing a lot over the weekend (~1000 gallons.) I last added acid, chlorine, & CYA about 8 days ago. My last test (7/3) at the pool store showed similar results, except for the CYA:

7.2 pH
5 ppm TC
110 ppm TA
15 ppm CYA

I backwashed a bit Saturday AM, and accidentally had something go wrong with putting the valve back to filter, and lost ~750 gallons. As such, I did NOT expect to see such a high CYA reading. Granted there could be some operator error involved, but I recently took a ton of college chemistry and biology classes (and had pretty good lab technique & grades), so I'm not sure if I did it grossly wrong. I will note that I'm taking the sample from the point of the pool where it starts to slope down to the deep end (the samples I had been taking to the store were all from the deep end.)

Just curious what to make of these and if I should shock the pool again this week?