Some background.. Second year pool owner.. Been doing TFPC method since I got it.. Never had anything but crystal clear water..
This year I definitely didn't test as much as last year but still had no issues.. Got ready to close my pool.. Here's what I did..
Checked FC and it was at 3.. PoolMath said to add 187oz of 8.25% to bring it to 12 so I did that.. Left the pull uncovered for the first time over night.. Let the pump run on high the entire time.. Checked FC about 24 hours later and it was 7!! What the heck??
So I go to PoolMatch again and enter 7 to get to 12.. It says 107oz.. I put in an entire jug of 8.25%.. Same deal.. Leave it uncovered, pump running on high for 24 hours.. Checked it just now.. FC IS SEVEN!!!! Is there some flesh eating bacteria that I'm not seeing or what is going on here??
9/21 - 5:30pm
FC - 7
PH - 7.6
TA - 110
CA - Guessing around 20ish?? I filled it to the top (30) and still saw the dot a little..
This summer I was putting in about 80oz of 8.25% every few days..
Please help a brother out..