(MIN510) (Potassium BiCarbonate) Acid Reducing Crystals are used to reduce the amount of acid in a finished wine. Wines too high in acid will typically have a sharp, to sour, or even bitter taste. These wines may also create a burning sensation upon swallowing. These crystals are an alkali substance that lowers the acid level through a neutralizing process. For each teaspoon added to a gallon of wine, the total acidity (TA) will lower by .18 Tartaric. Comes with complete directions.