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Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > can I use a 2l flask to make make my 1l yeast starters?
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Old 11-18-2011, 06:12 PM   #1
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Default can I use a 2l flask to make make my 1l yeast starters?

Can i use a 2l flask to make a 1l yeast starter or is there 2 much headspace in a 2l for a 1l starter.I want to start making yeast starters and I see on some supply sites they have a 1l and a 2l and the 2l is only a few dollars more.Is it worth it buying the 2l. I do 5 gallon extract brewing .


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Old 11-18-2011, 06:15 PM   #2
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The more head space the merrier when it comes to starters. A 2L should work perfectly for 1L starters. Howerver, before you buy an E-flask, you might consider using 1 gallon glass jugs instead. They are way cheaper and you can make bigger starters if needed. I use glass jugs myself with a stir plate and they work great.


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Old 11-18-2011, 06:16 PM   #3
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Yes. 2L is probably the most common size flask used. Don't worry about the headspace as any oxygen in the starter will be used up by the yeast when you put it into your wort and the colony reproduces.

If you use foam control like fermcap (and I highly recommend it for starters) you can get up to about 1600 ml in your 2L flask with no problem. That covers most of your ales up to moderately high gravity.

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Old 11-18-2011, 10:56 PM   #4
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2L flasks for 1L starters are completely normal. Just buy the bigger one, you will need it eventually.
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Old 11-18-2011, 11:20 PM   #5
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Definitely, it may even be better than using a 1L flask thanks to more headroom and potentially better gas exchange.
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Old 11-18-2011, 11:22 PM   #6
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Oxygen is good for starters, so the head space is your friend.
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Old 11-18-2011, 11:31 PM   #7
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Quote:
Originally Posted by rave808 View Post
Can i use a 2l flask to make a 1l yeast starter
Yes
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Old 11-19-2011, 12:15 AM   #8
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Quote:
Originally Posted by rave808 View Post
Can i use a 2l flask to make a 1l yeast starter or is there 2 much headspace in a 2l for a 1l starter.
I do it all the time with the air pump turned on 24/7.
Look at the picture



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Old 11-19-2011, 12:18 AM   #9
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Just do it.
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Old 11-19-2011, 04:46 AM   #10
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thanx for info


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