This has been an ongoing issue. New GHL pH probe needs calibration every time I turn off the return pump for maintenance, and that is weekly. The majority of the time I just let it go and let it read how it wants…in the 4-5 range and spot check with my Hannah pen to make sure…and of course the pen reads 8.3.
Is this common? I have moved the probe to a different area of the sump with zero changes.
Is this common? I have moved the probe to a different area of the sump with zero changes.