Ok…first batch for me and everything seems to be going great, until today. I brewed up some Caribou Slobber about three weeks ago…was in the primary (NB Plastic Bucket) for 10 days, then transferred over to the secondary (Better Bottle 5 Gal Carboy) where it has been for a week. Did a reading on the hydrometer and came out at 1.018. As far as I could tell, all was textbook.
Then today, I notice the airlock bubbling again every few seconds. I have had it in a temperature controlled room at 67 degrees during secondary fermentation.
Should I be nervous, or is this normal?