My apologies for not including the cya info, the cya levels were at 30. However, I believe that they may be lower since the black dot at the bottom of the test tube never completely disappeared, it was slightly visible at the lowest reading at the top of the tube - line labeled 30. This was the lowest measurable "labeled" line on the test tube.

The latest results are below:

As of 9am this morning:

TC 10
FC 10
PH 7.2
TA 150
Hardness 250
CYA 30 (can still see the black dot, although very hazy)

I was originally using HTH sock n swim with a 62% calcium hyp concentration, I switched to HTH shock n swim with a 52% calcium hyp concentration. Yesterday morning I added 2 bags of the shock n swim only to have it go to near zero yesterday afternoon. Yesterday evening I added two gallons of HTH liquid chlorinator 10%. As of this morning I was pleasantly surprised to see that the chlorine levels are holding strong, a bit high but it is raining at the moment which I believe will help dilute.

My pool is vinyl 26,000 in ground.

Is bleach the same as the liquid chlorinator that I am using? Is this laundry type bleach that I can get at the supermarket?

Thanks