Yesterday was a beautiful day. We hosted a BBQ and had up to 7 people in the pool with one being a 1.5 years old; when we took him kut we discovered he had pooped in his swim diaper needless to say everyone came out.
I measured the FC and CC and had 6.5/0. It had been 7/0 a few hours before we started swimming. The pump was running as was the LQ while we were swimming. My FIL who has had pools for 20+ years said if the FC and CC were fine then no need to shock? I listened to him but then tomb safe I did an overnight FC loss test and this morning it read 5/0. So I lost 1.5 ppm FC But the water still looks fine, no sun on it yet but it's crystal clear.
I bumped the FC up to 10 with a bit over 2 qts of CL about 15 mins ago I will remeasure in 15 mins to confirm I got it to 10