So after testing the pool at 11:30 PM last night, I was showing a reading above 5 ppm (as high as my test allows) but it was not as yellow as when 6 gallons of bleach was added at 7:30 PM. I added another 6 gallons of bleach. At 6 AM this morning, I tested and re-added 6 more gallons of bleach. Ph seems to be spiking when chlorine is added, as expected, and settles in at 7.2 hours later. Water is still cloudy, though.

I think I have turned the corner in my battle with whatever is causing my chlorine demand. Now I need a test kit that reads higher than 5 ppm chlorine. Does the 6 way HTH kit from Walmart read that high? I can get one today, otherwise I will order one from Amazon.