You should degas wine because carbon dioxide has a negative impact on the characteristics of your wine. Carbon dioxide forms in wine, and in all fermented beverages, as a matter of fact, as a natural consequence of the action of the yeasts.

Is degassing wine necessary?

Excess carbon dioxide can make your wine too acidic. This will alter the taste of the finished product and may make it unpalatable. Degassing is therefore important in ensuring that you get a nice rich flavor of wine without overly acidic undertones.

Should fermenting wine be stirred?

Once you add the yeast you will want to stir the fermenting wine must around as much as you can. The goal is to not allow any of the pulp to become too dry during the fermentation. Stirring it around once or twice a day should be sufficient. ... With your fermentation there is much less pulp.