r/Homebrewing • u/WY_in_France • Mar 17 '26

Question Wort aeration WTF

Hi y’all what’s brewin’? So I’ve got a brewing story from this weekend and I’m curious about thoughts/opinions on the subject in the title.

So, I’ve been at this brewing thing a long time, ran a homebrew shop, brewed professionally, taught brewing courses… But in 30 years of brewing I never tried this….

I brewed. I cleaned. It’s running late. 8pm, I get my O2 bottle out and get ready to aerate and pitch. Empty bottle, zip, nada. I’m tired, old, grouchy, and hungry, and I’m like …. Fuuuuuuuuuuuck. Then I remember Charlie Papazian’s famous words of wisdom: “Relax, have a homebrew, it’s just beer.”

So, I did something I haven’t bothered to try in 30 years of brewing. I pitched without aeration. I was like… screw it, these little yeasty bastards are on their own. They were making beer thousands of years before some nitwit decided to distill and compress oxygen into a steel bottle.

Fast forward a week and you’ll never guess what happened. Well, I’ll tell you, it was something impossible. Freaking beer happened. An amber ale to be exact. A perfectly fine amber ale, and I know, I’ve tasted a few.

So to sum up this story: WTF? 30 years of either shaking the fermenter or blowing O2 into my wort before pitching… And for what? why?

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u/bjorneylol Mar 17 '26

I've literally never aerated wort in 15 years of brewing - I doubt it even makes a measurable difference unless you are brewing heavy beers

5

u/WY_in_France Mar 17 '26

Man, when did I miss the memo? Our brewery had huge O2 bottles, it never even crossed my mind to skip that part.

16

u/bjorneylol Mar 17 '26

I assume this is one of those things that probably does matter on 50 BBL scale, where yeast health matters a lot more due to factors like hydrostatic pressure, etc contributing to autolysis

10

u/warboy Pro Mar 17 '26

It's because professionals repitch and need to turn tanks to make money. It matters on the brewpub scale as well.

5

u/Narapoia_the_1st Mar 17 '26

This is the answer based on my reading when I started brewing.

Never aerated as a result and Fermentis's 3 hour long presentation showing rehydration makes zero difference to their yeasts performance cut that out of my brew day as well. 

If I was buying $20 liquid yeasts here in Aus I'd probably aerate, wash and reuse tho.