White wine oxidizes quickly. You have to let is sit in a carboy instead of in the pail.
I fill the hole with the air-lock stuck in a rubber plug with a hole in it. Here is a picture. If you go to any wine or beer making store they can give you the information. However, be careful they may try to sell you all kinds of other neat things too
-------------------- STABLE: ♂, IBS-D 50+ years - Science of IBS