Hot and humid here for the last week or so. I was holding FC at 3-4 before the heat set in. In was running my IC40 10 hrs a day in my 44.5k gallons pool with it set on 80%. About two days ago I adjusted the run time to 12 hours and 90%. Last night checked it and the FC was 1. I added 2 gallons of leftover bleach from last year. This morning I checked it and the FC was 4.5.
I wonder if the cell is degrading or is the heat just getting the best of the FC level. I am running ph of 7.6, TA of 50, CH of 125, CYA of 50, and salt is 3400-3600.
Thoughts or recommendations?