Calcium Carbonate is used to lower the acidity in wine. 2.5 grams per gallon will lower the acidity approximately 0.1% You do not want to adjust your wine more than 0.3 - 0.4% or you will end up with a chalky/ gritty taste in your wine.
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I am not dissatisfied, but the brand received was not LD Carlson.
Use this product to make chalk paint. Love it! Highly Recommend!
I have reverse Osmosis water and using my pH meter i see that sometimes the must is too acidic so I add just enough CaCO3.to reach the lower end of the pH range.
My water is soft with no buffering ability thus I need this to prevent the pH of the must from dropping too far. It took some trial and error, slowly adding it, to figure out how much to add. Just go slow, a little bit at a time, wait for the pH to adjust, then measure.
I used this to increase the Carbonate level of my brewing water to match whatever profile I am going for. This small 2 oz. jar will go a LONG way considering you only add 1.0-2.0 grams per batch depending on what you are going for. So for very little money you can make significant improvements in your All Grain beer and it goes a long way. Plus you can reuse the bottle over and over, the cap reseals nicely.