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Old 09-26-2014, 01:51 PM   #1
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Refractometer vs hydrometer

Hello everyone! I wanted to ask your opinions on refractometers. I recently acquired a refractometer from brs. I was surprised at the difference between a refractometer and hydrometer. I always rinsed my hydrometer, before and after use. I tested my saltwater and had a SG of 1.0245. When I used my refractometer, my SG was at 1.027!!! I calibrated it and followed all instructions. At this SG, shouldn't all my fish be dead? I'm questioning the accuracy of my refractometer. Any opinions or experience would be helpful. Thanks.


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Old 09-26-2014, 02:29 PM   #2
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A slight upswing in salinity like 1.027 will not kill fish.

The refractometer, if calibrated correctly is wayyy more accurate than a swing arm hydrometer.
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Old 09-26-2014, 05:41 PM   #3
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Understood. Thanks Carey! The difference surprised me. I had the tests side by side.


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