Rouse the yeast & Raise the temp?

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HopHead73

Brewmaster at Jbyrd Brewing, Hophead
Joined
Jul 28, 2011
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Location
Norwalk
Celebration Ale Clone (extract kit)
White Labs California Ale Yeast (liquid vial, no starter, I know next time I'll make a starter)
Pitched at 68 degrees and good activity 18 hours later, got up to 71 degrees for the first 4 days of fermentation, but from days 5-10 its been around 64 degrees (house got cold and didn't have a temp control system) and the last 2 days have given gravity readings of only 1.020.
I aerated by pouring back and forth between the ferm bucket and bottling bucket and shook the bucket up before pitching, which is what I usually do and seems to work well for aeration on my other batches, but I did just order an O2 aeration system for my next batch.

I also did just get a Fermwrap and Johnson Digital Temp Controller to help in temp control during the colder months.
My question is would it work to swirl the bucket a bit to resuspend some of the yeast and use the Fermwrap to get the temp back up to 70 degrees to help it get down to a FG closer to the estimated 1.012?
I don't want to create any bottle bombs with a 1.020 gravity reading.
I contacted the store (Brewer's Apprentice in Freehold, NJ) where I get my kits and they weren't to sure if that would do anything, but shouldn't it help the yeast finish up since I feel like the yeast is probably just dormant from the colder temps? White Labs suggest 68-73 degrees.
Or is there anything else I can do to help it out?
 
If it's stable at 1.020 for 3 days, it's time to bottle.

Don't you run the risk of bottle bombs with a 1.020 gravity?
I've never had problems before with extract brewing with reaching my targeted FG.

At this point is the yeast just done?
The sample I tasted yesterday from my Thief does taste damn good (very close to Sierra's version IMO)
 
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