New refractometer - help

[AcroFan144]

Hello,

I am thinking of buying D-D H2Ocean seawater refractometer. So far I have been using a cheap, 20$ Amazon refractometer. However, it is constantly going out of calibration, within 30 seconds.

Does anyone have experience with DD refractometer? I would like to hear them!

Thank you

 

[vetteguy53081]

I dont but for a few dollars more recommend Hanna salinity digital tester or ice cap Digital version