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Hot weather and yeast deliveries: We may not despatch orders containing yeast on a Friday to avoid yeast sitting on the network over a weekend. If needed please include a delivery instruction to avoid yeast sitting somewhere hot or directly in the sun. Thanks!
Precipitated chalk (also known as calcium carbonate or acid reducing powder) is used to reduce acidity (raise the pH) in wines (or other brews eg beer) that are too acidic. 60g pack.
Start by dissolving 1/2 teaspoon per 5 litres in a small portion of the must and then mix the treated portion back into the wine.
Retest (or retaste) and add more if necessary.