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bertoni · 10/30/2017, 01:09 PM

Has the refractometer been tested with a calibration solution? The PinPoint salinity calibration will work, and it's cheap. You can make a calibration solution, too:

http://reefkeeping.com/issues/2004-06/rhf/index.htm

I suspect the issue is a bad batch of salt, though.

10/30/2017, 01:09 PM	#22
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	Has the refractometer been tested with a calibration solution? The PinPoint salinity calibration will work, and it's cheap. You can make a calibration solution, too: http://reefkeeping.com/issues/2004-06/rhf/index.htm I suspect the issue is a bad batch of salt, though. __________________ Jonathan Bertoni