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Old 10-12-2011, 12:28 PM   #1
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Default S04 and stuck fermentations

Is it just me? Each time I use S04 it seems to crap out if the temperature goes under 65F. I love dry yeast but it seems to be hard to get a clean profile and a dry beer with this stuff.

I use pure o2 and never have this problem with any other yeast.


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Old 10-12-2011, 01:04 PM   #2
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The recommended lower end of the temp range for that yeast is 59 degrees. Most that use it like to keep it in the low 60's for better flavor.


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Old 10-12-2011, 01:12 PM   #3
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I've used it in the low 60s and it's worked great! I've never had a problem with the strain.
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Old 10-13-2011, 04:57 AM   #4
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I've also used it in the low 60's many times with no problems at all
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Old 10-13-2011, 02:44 PM   #5
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If you're having issues with it dropping out then I suspect your temp is dropping lower than 65. Either that or your pitching too warm. I've found that with S-04 if you drop your temps more than a couple of degrees then it likes to floc out.

I pitch at 60-63 then ferment at 63 for 4 days. After that I ramp the yeast up 1.5F every day until I'm up to 76-78F. Then I start bringing my temps down and cold crash. Never had a problem with S-04 using this method.

Hope this helps.
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Old 09-22-2013, 04:19 PM   #6
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I used it a couple of times. The first one in a Bitter, 20 Celsius, fermentation stuck @ 1016. Bottled after 18 days. A *little bit* carbonated, but I did 2.0 CO2 vols ...it continued to eat the wort, IMO
Second one, an Irish Stout, 20 Celsius, stuck fermentation @ 1013 for two/three days (after two weeks of fermentation). Left another couple of days, reached 1011
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Old 09-22-2013, 04:37 PM   #7
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Is it old? The only time this happened to me was from using expired yeast.
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Old 09-22-2013, 04:40 PM   #8
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I got to say I like S04.
I just made an all grain IPA with a 1.070 SG, and its down to 1.014 in 2 days. I used 1 pack S04 and 1 pack Nottingham. This was fermented at 68F.


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