If you want your salinity expressed in specific gravity you need to convert it using salinity and temperature. This gives you a number in parts per thousand (e.g. 34.9 ppt) and in aquariums you need to know the specific gravity (e.g. 1.024). There are charts and conversion tables on the internet. I have NOT calibrated but I am getting accurate information. read. Calibration looks like a PAIN.
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