"Bob" > wrote in message
news:xlwod.72247$V41.2472@attbi_s52...
>I am trying winemaking for the first time with plum wine, due to
> this years great harvest. Would it have the same benefit to flush
> the top of the carboy with CO2 instead of topping it off after
> racking?

Gassing the headspace is OK as a temporary measure, but for more than a
couple of days storage it's an invitation to spoilage - particularly if the
free SO2 isn't maintained.

Also, remember CO2 is soluble in wine. As it dissolves in the wine it will
suck air in from outside if the carboy isn't stoppered tight.

Tom S