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3,108 Posts
So I finally got a refractometer after all these years 
I placed a couple drops of RO / DI water on it, and calibrated it at 1.000 (it was reading just a hair higher).
I then placed a couple drops of water from my reef on it, and the reading was 1.028 (edit - I got the saline solution to calibrate it properly)
My trusty salinity meter had a reading of 1.024 whereas my refractometer read 1.028
Wish I had one of these sooner, my salinity level is a tad bit high!
I placed a couple drops of RO / DI water on it, and calibrated it at 1.000 (it was reading just a hair higher).
I then placed a couple drops of water from my reef on it, and the reading was 1.028 (edit - I got the saline solution to calibrate it properly)
My trusty salinity meter had a reading of 1.024 whereas my refractometer read 1.028
Wish I had one of these sooner, my salinity level is a tad bit high!