Breathe, relax. OK.

According to The Pool Calculator(only use as directed) one gallon of liquid conditioner in 13000 gallon pool will add only 28 ppm CYA. 30 PPM CYA is the minimum readable on the CYA test that comes with the K-2006. The CYA's not gone, just below detection.

I'm sorry, I think you've posted in other threads but I can't recall right now. What are your most recent readings? How does the water look? What chlorine sources do you have on hand?