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Old 01-17-2011, 09:02 PM   #1
sockmerchant
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Default Another stuck fermentation thread

Hi guys
So… might have a stuck fermentation on my hands. In hindsight I probably didn’t aerate enough, considering the OG.

Had a go at a tripel. This is a half batch (2.5 gallons) with a low (65%) mash efficiency:
3.3kg german pilsner
60g aromatic
30g biscuit

90min mash at 65 C (BIAB)

15g styrian goldings 90 min (7AA)
7g saaz 15min
7g saaz 5 min
200g cane sugar
100g light brown sugar

OG was 1.082

Added 100g more table sugar as fermentation started to slow down
Used Wyeast 1214 with 1.5l starter (over-pitched if anything)

So its been sitting at 1.027 for the past few days. That’s only around 65% apparent attenuation. Raised the temperature to 23 C over the past two days to try and coax some more activity out of em.

I will leave it for another few days and see what happens, but I really want it to finish a lot dryer. I have some Vinters SN9 yeast that I was intending to use for some cider in the near future. Its supposed to be a very neutral yeast. Would it be possible/advisable to pitch this while moving to a secondary to finish the job. As I said I’ll leave it a bit longer to see if it drops at all, but I honestly doubt it will get to 1.020. Was kinda hoping for lower.

Advise please advisors

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Old 01-17-2011, 09:33 PM   #2
scinerd3000
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maybe warm it up further to 25C...right now your sitting at ~7.2%ABV. You should be able to get your final gravity lower with a low mash temp of 65C. Try to swirl up some of the yeast from the bottom without aerating it and move to an even warmer area. Good luck

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Old 01-17-2011, 09:40 PM   #3
sockmerchant
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Thanks. Already swirled it once. might try it again and raise the temp.

And yeah, pretty much thought I did all i could to give the yeasties a good shot. Though as i said, I could have probably aerated a fair bit more before pitching. Oh well.

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