Just calibrated my refractometer with pinpoint solution.
I go to measure the salinity in my tank, then check the calibration solution again, and it's already dipped down some, no longer accurate.
Is there something that I can do to "tighten" calibration so it won't drift off so quickly?
I go to measure the salinity in my tank, then check the calibration solution again, and it's already dipped down some, no longer accurate.
Is there something that I can do to "tighten" calibration so it won't drift off so quickly?