I recently found some mold on the top of my wine on one carboy (5 gal). Its a cab. that i am bulk aging since sept. Im afraid that wine is ruined. its acutally some round mold signals on the surface. I tried to put as much wine until very close to the airlock, but withpout touching it. (1.5 inch at the most distance) What can I do? i have reracked it several times , Can i rerack it again and put some more metabisulfite? how can i prevent this from happenning to the other carboys? (3 more).