(Hopefully) finishing up my first batch of mead - started in Oct. Most everyone I've talked to and read has said that after it's done bubbling, let it sit another month or so to ensure that it is truely finished. When I looked yesterday, the airlock was pulling the water toward the carboy. Not enough so far to actually round the curve and enter the carboy, but the 'closer' water chamber is higher than the 'farther' one, indicating some sort of vacuum. Is this normal or a bad sign? Thanks.