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- Apr 25, 2018
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I make my own conductivity standard based off Randys article from 2006 and calibrate mine using that. Its cheaper and i had some bad Hanna packets that had me running high salinity. It reads no difference between new saltwater and tank water. I wonder why some people have this issue...Randy is being diplomatic about it but the Hanna Salinity Checker has a known issue whereby it works fine reading salinity for fresh made saltwater but on some peoples aquariums it reads .03ppt low. Not that refractometers are bulletproof, but no one should rely solely on the Hanna Checker to maintain salinity.