You need to top that with anything, don't wait until you rack again.
Unless you are talking about less than an inch of headspace it's just
not a good idea to leave a lot of surface area in wine, especially a
white. You really are better off minimizing contact with air as much
as practical in addition to proper SO2 levels.

Joe
>
> My chardonnay didn't fill the carboy. When I rack again I'll move to
> smaller carboy's.
>