Introducing air into the wort to increase the amount of dissolved oxygen.

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Aerating wort with an air pump. What's the proper gallon rating?

I'd like to aerate three gallons of wort using my aquarium pump and 2 micron stone. The pump is rated for 10 gallon tanks. Is this sufficient?
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75 views

Can I re-aerate in the Primary?

Is there a downside to shaking the primary fermenter to re-suspend the yeast if the fermentation is going slowly?
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3answers
1k views

Why use Oxygen tanks to aerate wort, what are the benefits?

Do you notice any benefits in flavour or yeast activity over a regular air pump? By not blowing dirty air through your wort, could it keep down infections/contamination? Does pumping regular air ...
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1answer
164 views

May I Aerate AFTER Pouring Yeast into the Carboy?

I extract brew, and the kits I buy from NB tell me to add cold water to the wort to get a total of 5 gallons, and then aerate before adding the yeast. However, if I do this I will always have more ...
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1answer
541 views

What is the proper way to supplement a yeast starter with oxygen via an aeration stone?

I have two yeast starters going on my two homemade stir plates. The stir bar or the stir plate for one of them is malfunctioning and I can not increase the speed enough to get a vortex going. It is ...
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1answer
351 views

Yeast Starter Vortex Size

I've read online that the size of the vortex in a yeast starter does not matter. Why is this true? When I was experimenting with water yesterday, I created a monster vortex (very cool) and could see ...
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1answer
181 views

When is aeration good and/or bad in homebrewing?

I had thought that the point of using a siphon when moving wort/beer is to prevent agitation and aeration and a ruined beer. So we use the siphon when moving cooled wort to the carboy for ...
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1answer
2k views

What are the primary causes of Acetaldehyde?

I'm a bit confused about this. In my own experience, I'm no longer experiencing acetaldehyde flavours in my beer after improving my aeration methods and at the same time starting to use yeast ...
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3answers
2k views

Can Dried yeast function at a low temperature?

I started my first batch of home brew lager around 24hrs ago I aerarted it and it was at 20 Degrees celcius but does not appear to be fermenting..... I know people say I have to give it time as I read ...
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1answer
270 views

Aerating bottled apple juice for cider

I understand that disolved oxygen is good for yeast, and aeration is done near the time of pitching in beer making. Does this rule hold true for bottled apple juice as it does for wort? Would apple ...
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2answers
214 views

oxygen and yeast pitching rates

Many online references, such as BYO, mention that oxygen is needed by yeast to reproduce, and that a wort with low dissolved oxygen levels will have longer lag times and less attenuation. This might ...
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4answers
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Aerating When Moving from Mash tun to Boil Pot

When transferring from the mash tun to the brew pot, I had set the mash tun about 3 feet above the brew pot and let the wort flow out and fall to the pot. This caused a large amount of bubbles that ...
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2answers
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Fermentation started, then stopped the next day. Is my yeast dead?

This is my first shot at homebrewing, using Northern Brewer's American Wheat Beer kit which is based on liquid malt extract, Willamette and Cascade hops, and a packet of dry yeast. I brewed and put ...
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3answers
483 views

Can I aerate again before bottling?

I have a Dunkelweizen from a Northern Brewer all-grain kit that I brewed and pitched 2 weeks ago. I have one problem, I forgot to aerate before I pitched the yeast. I'm concerned that the yeast will ...
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1answer
461 views

What are the best practices for using a wine degasser to aerate wort for beer?

I have a wine degasser, which is a bit like an egg-beater for a power drill. It aerates wort extremely well but I don't have a good rule of thumb for how to tell when enough is enough. Should I: ...
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1answer
131 views

Are there any particular steps to fixing a batch of beer with extra trub / hot-break, or should it settle (as best as possible) on its own?

I made a silly mistake using a wine degasser to aerate my wort. After cooling the wort I aerated in the brew-kettle, with trub/hot-break still present, rather than racking to a carboy before ...
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1answer
232 views

Should Priming Sugar Solution Have Minimal Oxygen?

When I bottle, I follow the typical step of boiling some water, adding bottling sugar, letting it cool, and adding it to the beer that's done fermenting (but still of course has live yeast floating ...
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1answer
154 views

Long cooling before pitching — aerate now or later?

This is a follow-up to this question: Long cooling before pitching -- read that for background. I aerate to add oxygen to my wort by pouring back and forth between buckets. If I wait before ...
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1answer
310 views

How to reduce head when aerating wort with an aquarium pump

Last night I embarked on a fun adventure to create a 14-16% ABV beer (Dema Goddess Ale), and it calls for aeration via an air pump that you would typically use in an aquarium. Due to the high ...
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2answers
520 views

How to measure wort oxygenation

As a follow-up to a couple of other questions: How to Properly Oxygenate Wort Wort aeration on a budget How do you measure oxygenation of wort? What methods are available for a beginner brewer ...
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5answers
1k views

Is it necessary to aerate wort when pitching onto an existing yeast cake?

To my knowledge, aeration provides oxygen so that the yeast can reproduce before fermentation. If you're pitching onto an existing yeast cake, there should theoretically be enough yeast already to ...
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4answers
5k views

How to Properly Oxygenate Wort

How much oxygen do I need to put into my wort? I've heard that homebrewers need to aerate with an oxygen stone and either aquarium pumps or oxygen. Is this true, or is shaking my carboy enough to ...
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6answers
1k views

Wort aeration on a budget

To aerate my wort I have been using a whisk, but i am worried about contamination. What are other more effective ways to aerate wort without spending too much money?
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1answer
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Is trapped air in a counterflow chiller really an aeration risk?

I recently bought a Blichmann Therminator counterflow chiller (I know, extravagant, but it is the awesome). The instructions say to operate it with the hot wort input facing down, so that gravity ...
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3answers
337 views

Is aeration necessary if you overpitch?

We all know that aeration is necessary for yeast growth. Does it facilitate more than that? If you massively overpitch, on a previous yeast-cake for example, do you need the same amount of dissolved ...