Refractometer Errors

[Der_Iron_Chef]

Interesting read. Can your "problem" be solved by correctly calibrating your instrument, or do you need to buy another refractometer altogether? I guess it depends on whether or not the refractometer in question was actually designed for what it's being used.

From everything I've read on various forums, refractometers are the easy, flawless way to determine salinity/specific gravity. Now I'm learning that that's not necessarily the case! I think I'll prepare one of his DIY calibration testing samples to check mine out.

Thanks for the heads up.