I have a old refractometer that has always been close but always calibrated with rodi water .
since buying a Hanna salinity checker I have used it but questioned its accuracy .
can the same calibration fluid be used from Hanna to a refractometer ?
what’s the different between 35ppt Hanna calibration fluid and 35ppt refractometer calibration fluid ?
After calibrating the refractometer with the Hanna fluid , checked my tank and it was 1.030.
checked the tank and new water mixed for water change with the Hanna checker and it was 1.025
since buying a Hanna salinity checker I have used it but questioned its accuracy .
can the same calibration fluid be used from Hanna to a refractometer ?
what’s the different between 35ppt Hanna calibration fluid and 35ppt refractometer calibration fluid ?
After calibrating the refractometer with the Hanna fluid , checked my tank and it was 1.030.
checked the tank and new water mixed for water change with the Hanna checker and it was 1.025