I've been using 21,000 gal. as my pool size based on length x width x average depth. But, when I put the 8 pounds into the calculator, the number was too low. Then I did some research and the manufacturer has the pool capacity at 15,250. This makes sense because the pool has a large tanning ledge with steps reaching out into the pool. So I feel comfortable using that number from now on.

Back to the CYA, according to Pool Math, if I start from zero and add 8 pounds to a 15,250 gal pool, the CYA should be 63. A lot closer to the pool store number than my "look for the dot" test. My last pool store reading for CYA was 56. So, what I figured I'd do is run the dot test up to around 60 and look at it and use that as my benchmark going forward. I think I'll also go to the pool store from time to time and compare figures. I understand that is a no-no, but actually, the pool store readings and my T-100 tests are pretty consistent. The main thing is what I do with the information and that's where TFP comes in.

FWIW, today's readings:

PH - 7.6

FC - 4.5

CC - 0

CH - 200

TA - 90

I'll be doing the OCLT tonight. Then we'll see what adjustments need to be made, if any.

Thanks.