Triple scale hydrometer reads in three scales – Specific Gravity, Brix/Balling, and Potential Alcohol

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Triple Scale Hydrometer for Beer, Wine, Cider,Alcohol Testing for Home Brewing by Ferroday

Also: Yeast Starters & Fermentation | StirStarter Stir Plate | Yeast: The Practical Guide to Beer Fermentation

Great Prices on Dry Beer Yeast at William’s Brewing