Potassium Metabisulfite is to be used in wine making to inhibit bacteria growth, too high a dose will leave an unpleasant taste.
Add 1/4 tsp. per 5 gallons before fermentationfor 50 ppm (wait 24 hours to add yeast) and another 1/4 tsp. per 5 gallons before bottling wine (wait minimum 3-4 days to bottle).
An equipment sanitizing solution can be made by adding 1 Tbsp to 1/2 gallon of water (requires rinsing after).
Potassium Metabisulfite is preferred to Sodium Metabilsulfite as it does not add sodium.
Using granular form of Potassium Metabisulfite requires 3/8 of a teaspoon to equal 5 Campden Tablets which will treat 5 gallons of wine to approximate 75 ppm of Free SO2.
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