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Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Yeast starter - Airlock or foil?
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Old 01-08-2010, 01:42 AM   #1
grimeey
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Default Yeast starter - Airlock or foil?

Hey all - I just did my first yeast starter last night - been just dumping the vial from my LHBS into the fermenter with decent results until now. I've read many posts about Yeast starters and the main question is should I use an airlock or sanitized foil? I used foil on the one last night..


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Old 01-08-2010, 01:46 AM   #2
sonetlumiere85
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Personally, I use a foam stopper. It allows oxygen in, but nothing bad. Since oxygen is helpful for yeast growth, it works really well. Airlocks don't allow oxygen in, so I don't see much point in using one, except to see CO2 escaping, which is sorta silly. I've also used the tinfoil method, and it works pretty well.


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Old 01-08-2010, 02:22 AM   #3
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+1 on tinfoil, but I just picked up some foam stoppers for my 2000 ml flask.
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Old 01-08-2010, 02:30 AM   #4
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I used an airlock until I got a stirplate from stirstarters, now I use foil, I am constantly acquiring new equipment, almost weekly, lol
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Old 01-08-2010, 02:35 AM   #5
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I use foil too. Never a problem. Knock on wood.
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Old 01-08-2010, 03:01 AM   #6
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Another vote for foil...
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Old 01-08-2010, 03:02 AM   #7
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+1 on foil, but this foam stopper thing is sounding good. Any links to foam stoppers?
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Old 01-08-2010, 03:09 AM   #8
BioBeing
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There has been a lot of discussion on here about this. As far as I can tell, the best solution is just foil. An airlock is essentially a one way valve that lest the CO2 out, but no O2 in. At least with foil there can be some diffusion of O2 in.
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Old 01-08-2010, 04:03 AM   #9
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I have a 100% success rate using foil. Fold it to a 3x3 or so square, spray it with Starsan, fold it loosely over the top and you are good to go. Cheap & effective. Montanaandy
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Old 01-08-2010, 04:05 AM   #10
sonetlumiere85
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Quote:
Originally Posted by BioBeing View Post
There has been a lot of discussion on here about this. As far as I can tell, the best solution is just foil. An airlock is essentially a one way valve that lest the CO2 out, but no O2 in. At least with foil there can be some diffusion of O2 in.
Right, and foam stoppers let oxygen in but provide an essentially impenetrable barrier for bad stuff, and they also allow CO2 to escape. Seriously, they're like $1 each, even cheaper in some places. For my money, they're much better than tinfoil. The only downside is that if you build too big or too vigorous a starter for the container the starter is in, the krausen can potentially get in it, and either push it out or dry it out. The stopper can then get stuck in the neck of the flask. I know because this has happened to me.


Anyway, here's what I'm talking about:
http://www.northernbrewer.com/defaul...r-35-45mm.html
http://www.northernbrewer.com/defaul...r-46-50mm.html


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