After doing this on a a number of wines, I'd say there's no problem - in
fact it's a lot better than the alternatives of adding water or leaving too
much head space. Your other options are to add sterilized marbles (a bit of
a pain, but workable if you're topping up a wine that's hard to match, like
an ice wine), or rack into a smaller container.

Ed

"Matt A" wrote in message
...
I found the following information:

" ... don't go out and buy commercial wine to top up your carboy (it will
probably contaminate it anyway) ... "


Is this true, will commercial wine contaminate ?????


(I apologize if this has already been discussed.)