Testing 5-hr old sample

JohnGn

Gold Supporter
Sep 28, 2019
57
St. Louis, MO
Pool Size
19000
Surface
Vinyl
Chlorine
Liquid Chlorine
I am doing a SLAM and got up before sunrise to pull a sample, but did not test it right then. Would my FC reading still be accurate enough to trust it after about 5 hours sitting in my dark basement?
 
Technically is should, but we do not recommend it. Worst case, the FC will be lower so your OCLT would fail.
 
Yep, that's what I figured. And, my FC level was at my exact desired level at 10pm last night. Just couldn't bring myself to do that test while still half asleep at 0530 this morning. I will rinse and repeat tomorrow.

Thanks!
 
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