pl321

I went home right after work a did a test and it was 3.8. One thing I remembered is that my filter timing my have played a roll. It turns on at noon and off at 8:00 pm. So the SWG would only have been running a couple of hours before I took the sample to the Pro. Could the FC drop that quickly from 8:00 pm to noon while the SWG is off? I'm going do some testing tomorrow and maybe take a sample to another store that uses vial system. Trying not to use up all my powder in the process.