Get your HBT Growlers, Shirts and Membership before the Rush!

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Aeration
LinkBack Thread Tools
Old 12-06-2013, 08:51 PM   #11
Feedback Score: 0 reviews
BigFloyd's Avatar
Join Date: Dec 2012
Location: Tyler, Texas
Posts: 4,813
Liked 628 Times on 549 Posts
Likes Given: 575


When you boil the wort, you drive much of the dissolved gases out of it. Yeast need dissolved O2 to reproduce during the early stage (aerobic) of fermentation. Dry yeast is packaged with sterols which provides the O2 needed to get them through that stage, but not the case with liquid yeast so extra aeration/oxygenation of the wort is critical to yeast health and a good fermentation.

Splashing into the fermenter is fine if you're using dry yeast and that's what I'll do even though I have an O2 tank and stone. With liquid yeast (especially in a lager ferment) however, you really ought to make the extra effort to introduce new O2 into the wort. Pure O2 through a 0.5 micron stone gives the highest level of dissolved O2, but it's not cheap to get set up that way. Next best is the aquarium pump/stone or aeration wand on an electric drill. Some folks will shake the fermenter, but 5+ gallons is a wee bit heavy.

It's also important to aerate your starter wort.

Good Temp Control -----> Happy Yeast ------> Tasty Brew
BigFloyd is offline
Reply With Quote Quick reply to this message
Old 12-06-2013, 08:58 PM   #12
Senior Member
Feedback Score: 0 reviews
HopSong's Avatar
Join Date: Sep 2011
Location: Healdsburg, CA
Posts: 1,917
Liked 91 Times on 81 Posts
Likes Given: 11


With O2 you have to be careful on how much/long to aerate. 15-30 secs should be fine. Too much O2 can be detrimental to the yeast.

Cheers, Bill
Hop Song Brewing
Healdsburg, CA
HopSong is offline
Reply With Quote Quick reply to this message
Old 12-06-2013, 09:46 PM   #13
Feedback Score: 0 reviews
Join Date: Nov 2010
Location: Bay Area, CA
Posts: 147
Liked 16 Times on 16 Posts
Likes Given: 8


Originally Posted by dangerbrew View Post
I always think it's pretty funny as to what lengths people will go to aereate their wort. Stones, wands, etc. Buying extra devices to do something that can be done very, very simply.
I share your skepticism, but I rarely make anything north of 1.060. If I was a high-gravity aficionado, I might give pure O2 more serious consideration.

(I actually just added a simple in-line Venturi areator, but that's as far as I'll go for now.)
corax is offline
Reply With Quote Quick reply to this message
Old 12-07-2013, 01:35 AM   #14
Feedback Score: 0 reviews
Join Date: Apr 2013
Posts: 121
Liked 1 Times on 1 Posts


Thanks everyone, just bought the unit from Williams brewing. Happy holidays!

colbreeze is offline
Reply With Quote Quick reply to this message

Quick Reply
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
under aeration? TeaKettle Fermentation & Yeast 4 03-07-2013 07:18 PM
Aeration McCuckerson General Techniques 31 06-29-2012 02:45 PM
aeration docmoran Beginners Beer Brewing Forum 5 03-23-2009 04:43 PM
Aeration. How Much? dexter_craig General Techniques 4 01-21-2008 02:56 AM
Aeration kbesch All Grain & Partial Mash Brewing 17 05-03-2007 06:02 PM

Newest Threads