WARNING. Make sure you keep your Ph meter calibrated. Mine was off nearly 2.00 for 2-3 weeks before I figured it out. I’m hoping to be able to salvage my grow.
I actually test mine min once a month
Storing meter is storage solution helps also keep meter conditioned
Ive also had that same issue in the past
Its a good idea when you start a grow to get baseline numbers
Check water ph is 6.8 or whatever
Next time you water it should be there
Same with feeding when you take that initial reading it should be close to same next time
If numbers are good a check of calibration is a good idea @Tstar
Glad you caught it
Can you put a picture whit your pH meter in that storage solution?
Do you use a jar or a cup and you let him stay in that solution?