Out of curiosity, I took a pool water sample to my local pool chemical store for testing. I wanted to see how their numbers compared to my own, Taylor K2006. The sample I gave the pool store was no more than 15 minutes old. Here's what they came back with:
FC 3.24 ppm
CH 300 ppm
TA 40 ppm
CYA 45 ppm
The FC number surprised me, as I've struggled to get FC levels that low and I've forgotten to turn the chlorinator down since the water has been getting colder. The pool is only 3-4 months old and I'm still on the learning curve. I decided to do my own test, about 2 hours later from the original sampling. Here's what I found:
FC 9.5 ppm
CH 180 ppm
TA 60 ppm
I didn't check CYA this time but after adding CYA a few weeks ago my levels have routinely been in the 80-90 ppm range.
As you can see there are some wide variations, which begs several questions. Am I doing it wrong? I've watched many videos on water testing with the K2006 kit and I am very careful to follow the instructions. Which readings are real? Can the local pool store's readings be trusted?
Thanks for the help.