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Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Pros/Cons of Yeast
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Old 01-25-2012, 05:49 AM   #1
ringatom
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Default Pros/Cons of Yeast

Is it of any benefit to add extra yeast to your brew, I'm making a Coopers English bitter and it came with a 7g packet of coopers yeast, so if i added another packet of yeast will it have any benefit/disadvantage to my brew.
EDIT: i wouldn't add the extra packet to this brew at the moment, but in the future for any other brews.



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Old 01-25-2012, 06:15 AM   #2
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umm.. generally speaking... Yes there is !

You should try to follow the recipe...


But I do not think there would be a downside to adding another packet (other then the cost of the pocket).


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Old 01-25-2012, 06:15 AM   #3
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It depends on the gravity of the beer. It is really difficult to over pitch yeast at a homebrew level. However, pitching 2 yeasts is about the equivalent of making a starter. One of the biggest things to think about while pitching yeast is how much yeast you are pitching. Not pitching enough yeast can result in stuck, stalled, incomplete fermentations. You can also stress the yeast out by not pitching enough.

When you aerate the wort, you are adding oxygen. Adding oxygen helps the yeast create daughter cells of themselves. During the first 30 minutes of inoculation is when you see this activity. Then the oxygen is gone and the yeast go anaerobic where they make ethanol. Higher gravity beers generally need more yeast to help finish the job.

Essentially what I am getting at is that adding two packets of yeast will not hurt your beer. Aerate it well and you should be able to get the full attenuation that you want. Don't stress out the yeast by under aerating or under pitching.
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Old 01-25-2012, 09:41 AM   #4
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Pitching the right amount of yeast is one of the most important aspects of brewing. You'll see that on these forums; I heard Jamil Z and other famous brewers saying this on a podcast, too.

As you get your process dialed in, you may wish to do some reading about yeast and pitching rates, aeration, temp control, etc. Yeast (by JZ), mrmalty.com, and even the Yeast/Fermentation area here at HBT are some good resources. It will take your beer from good to amazing!

As for the OP, while it's not as likely to cause disaster as under-pitching your yeast, over-pitching can create less than ideal flavors. Rather than pitching the second packet, I'd use the yeast calculator (mrmalty.com) to determine how much you need and go from there

Cheers!
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Old 01-25-2012, 04:15 PM   #5
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The basic idea is that there is X amount of sugar to eat (indicated by your original gravity), the yeast are going to reproduce at Y rate, so you ideally want to grow a colony that is large enough to eat all of the sugar after they propogate, but not have extra yeast that don't get any sugar.

Here's a good calculator on the EXACT correct amount to add to your beer:

http://www.mrmalty.com/pitching.php
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Old 01-25-2012, 04:20 PM   #6
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Pitch rate all depends on what it is you are trying to achieve with fermentation.

Too low can cause stress but also creates more flavanoids.

Too high can improve attentuation but can also be very neutral.
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Old 01-25-2012, 09:19 PM   #7
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would it increase the ABV
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Old 01-25-2012, 09:42 PM   #8
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You might get slightly higher ABV due to higher attenuation, but it would be pretty minimal. What you are shooting for is efficient, happy, healthy yeast.
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Old 01-26-2012, 12:31 AM   #9
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What are way's that i could increase the ABV because right now, my OG is 1.023 and my gravity now that i have racked it into the carboy is 1.009, fermenting at around 80 - 81 F which only gives me a ABV of about 2%.. I was hoping for around 3 - 5 % ABV. how could i increase it if possible.

and what could i do next time to increase my ABV for other brews maybe like 5 - 8 % if possible
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Old 01-26-2012, 12:37 AM   #10
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Dump two or three pounds or white sugar or some dry malt extract in there. Yeast will eat it up for your benefit. ABV!


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