I have three healthy salt water tanks. All 1.021 to 1.023 salinity according to my refractometer and the exact same hydrometer I bought a few years ago. I have salt water tanks on two floors of my house and I'm tired of lugging a hydrometer up and down the stairs every time I check the salt level. This new one is maxed out on all three tanks at once. Greater than 1.032, although I know they are all at or below 1.23. I don't expect a perfect measurement for these things, but that's ridiculous.
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