The last time did a full test of chemicals was August. I do chlorine and ph at least once a week and daily during swim season.
At last check CYA was 40-50 range. Today 60ish. I use a stennar so no new cya added but I attribute the change to the mysterious vanishing dot. I'm never confident in my cya test results. I'll assume it has always been about 55.....?
TA dropped from 60-70 range to 40.
Biggest surprise. Borates dropped from 50 to 15? No large water dilution or the cya woud drop?
Is the cold (55degrees) water effecting readings? Should I add team mule now or wait for warmer water?