Hi, Roxy,

You, Michael and I are almost on the identical page. You seem to have a really good grip on this pool chemistry stuff. Wish I had learned that fast.

The problem with your Alk test is you should never get a 39. It should be measurable in units of 10.....80, 90, 100, 110, etc. Reread your test directions and try it again tomorrow.

If you had your pool installed, Michaels advice is on the money....check to see if any CYA was already added.