Hi everyone, I have never seen this, but after 3 weeks (1 week fermenting, 2 weeks in secondary), one of my beers has started to bubble again yesterday.
I brewed on 7-30 Cheesefood's Vanilla Caramel Creme Ale, and reracked after the bubbles stopped to a secondary (8-04), had a day of bubbling again, and then it was silent.
Yesterday, the secondary started to bubble again, about 1 rhino fart every 3 seconds. Here is a picture of the fermenter.
The hydrometer readings are as follows:
OG: 1.044 (Didn't quite get it high enough)
Sample gravity after reracking on 8-04: 1.021
Today's Gravity: 1.020
I'm guessing since the final gravity is 'supposed' to be around 1.014, that some freak yeast thing happened and now it will finally drop the gravity more so.
Edit: Forgot the question...
1- Is this normal?
2- Should I let it be?
3- Contamination or not? (While taking the reading, it smells great!)