Fermetation started again

[LocalBrewer]

I have a belgian white that has been fermenting for about 3 weeks. It is closing in at around 8.5% took a reading this weekend and I need to get down 6 more points. Fermentation was quite slow, airlock showed activity once every 15-20 seconds. After I took my reading I shook it up pretty good to get the yeast back in suspension. it has been 2 days and I went to take a look and fermentation started to pick up again. Activity in the airlock every 3-5 secs. I also have a layer of yeast back on top. By shaking it up, did this restart fermentation or do you think a few bugs flew in and started it up again?If bugs did fly in would activity start back up that fast again? I know taste test will tell if it is infected but just looking for some input from the army.

Thanks and Cheers!

[ninetoedbrewing]

I have a belgian white that has been fermenting for about 3 weeks. It is closing in at around 8.5% took a reading this weekend and I need to get down 6 more points. Fermentation was quite slow, airlock showed activity once every 15-20 seconds. After I took my reading I shook it up pretty good to get the yeast back in suspension. it has been 2 days and I went to take a look and fermentation started to pick up again. Activity in the airlock every 3-5 secs. I also have a layer of yeast back on top. By shaking it up, did this restart fermentation or do you think a few bugs flew in and started it up again?If bugs did fly in would activity start back up that fast again? I know taste test will tell if it is infected but just looking for some input from the army.

Thanks and Cheers!

I have brewed two Belgian Whites in my time, and both times the yeast flocculated out and I had to swirl the carboy to get things going again. The second batch scored extremely well at NHC, so I doubt its bugs--that Belgian Wit yeast just flocks like a ton of bricks.

[Stinkfist]

Shaking it up can get yeast back up in suspension and can drop you a few more points if there are any available sugars left...