Stopping Fermentation before estimated FG

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Stopping Fermentation before estimated FG

Postby Arneba28 » Tue Feb 12, 2008 3:44 pm

The IPA I have in primary is almost done fermenting but I still see a little activity in the carboy. bottles through the airlock have all but stopped, one every 10 minutes or so. my OG was 1.0626 and beer tools has FG at 1.013. I took a gravity reading today and its at 1.023. I would like to stop fermentation soon so it does not reach the FG that beer tools put it at. If I rack to the secondary will there be noticable continued fermentation from the least that is still in suspension and had not dropped
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RE: Stopping Fermentation...

Postby wottaguy » Tue Feb 12, 2008 4:40 pm

Hi Arneba28,

Just curious here...

Why do you want to stop fermentation at 1.023? How long has it been fermenting in the primary?

It is usually best to let the beer ferment all the way out, and with this beer of your's that could take up to 14 days. I usually keep all my ales in the fermenter for a minium of 21 days...and have left it in a lot longer at times.

Just had to ask why you wanted to stop fermentation at such a high gravity.

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High FG

Postby slothrob » Tue Feb 12, 2008 5:42 pm

This is almost never a good idea, and 1.023 is very high to want to stop a beer.

About the only safe (as in no bottle bombs) way to do this is to keg the beer and cool it to drop the yeast and stop fermentation.

Even in that case you run the risk of off-flavors due to incomplete fermentation. Remember that a lot of the undesirable fermentation byproducts get removed by the yeast after they've run out of sugar to eat.
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