Update: Tested FC and CC again (4 hours after initial test this am). Good news. FC up to 22 and CC down to (barely) 1.5 - pH holding strong at 7.2 - surprisingly with all that FC.

Questions: Let's say hypothetically, my CC gets down to 0 today, what do I do next? Just let the CL levels come down on their own? Should I do a maintenance dose of polyquat 60 and if so, when (now, or when CL is down)? And should I do that weekly? Once all numbers are in check, how often should I be testing/balancing my pool in 'maintenance mode'? How do I know I need to shock (I know after considerable rains)? Whenever CC is above .5?