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Refractometers
(lemmy.world)
A community dedicated to homebrewing beer, mead, wine, cider and everything in between. If it ferments, bring it over here.
Share recipes, ideas, ask for feedback or just advice.
Some starting points for beginners:
Quick and diry guide to fermenting fruit - cider and wine
This is a classic mistake people make to try and measure final gravity with a Refractometer.
As everyone else has said, the alcohol in the solution throws it off.
You need to use a correction calculator or just use it for initial gravity and get a test tube and float your hydrometer in it for final gravity