Okay, I have my K-2006 kit in hand now. I've been adding chlorine regulary to my pool to keep it in the strong yellow range. I was using bleach but my wife was very leery of the concept of 'bleach' in the water (even after I explained to her that bleach was basically chlorine and water) but am now using hth Chlorinating granules (calcium hypochlorate).

I followed the directions for the CYA test, but wasn't sure about one thing - how much should the dot "disappear"? It went from black to a light greyish but never really disappeared. Or is that how it should be? I had added 2 lbs of CYA about 10 days ago via the sock in the return stream method.