Thanks for the help. Here's an update. The temperature here has been 100+, I brought the chlorine level up, but the conditions continues to deteriorate. Tonights test values:
FC 16
CC <.5
TC 16 - 16.5
PH 8.2
TA 110
CH N/A
CYA 80
Based on the results, I'm bringing the FC up to 21 (shock), and...