hanna salinity

I have been using refractometer for couple months now and been calibrated by refracto juice to 35ppt. Just purchased Hanna salinity checker and calibrated using provided fluid. Tested my tank it shows 30ppt on my Hanna and 35ppt on refractometer. I am confused on which on is more accurate. Any...

Selling a Brand New still sealed Hanna Salinity Checker. Bought less than 3 months ago. $65 Shipped!

So I have been using the hanna digital salinity checker for my salinity readings for the past year or so and have consistently gotten a reading of 1.023 with an occasional jump to 1.024. I just bought a refractometer and tried it today and got a reading of 1.026. This is a day after getting a...

What does everyone out there use to calibrate your temperature controller? This all started because I noticed my Hanna salinity checker is consistently 1 degree below what my controllers say. Here are my options: The controller itself. Cheap glass thermometer that came with a 20g tank: 72...

Anyone use the Hanna Salinity Checker? I am having issues with mine. It was showing 25% battery left and err. So I replaced the battery, and still says 25% and err. Anyone have this issue? Know how to fix it? Help.