Sorry, I think the pool volume setting went back to 10000 gal. Does that sometimes. Yes, 13.5 gives 2.6 ppm FC.Chris, are you sure about the 8 hours at 60% to create 2.5ppm? According to the manual, the nano+ creates 20g of chlorine per hour, or 1.06 lb per day. That would require 13.5 hours at 60% to create 2.5 ppm.
But agree on the OCLT. FC shouldn't drop by more than 1 ppm over night with the SWG off.