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Potassium Metabisulphite


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Sanitizer - use 2 oz per 1 gallon of water.  Antioxidant and bactericide - use 1/4 teaspoon to 6 gallons.  Dissolve sulphite in warm water before adding.  Virtually the same as Sodium Metabisulphite except for that this contains the Potassium ion vs the Sodium ion.