Wyeast on Aquarium Pumps

[jamesmp]

I'd been under the impression for a while that diffusion stones were the best route for oxygenating wort but browsing through Wyeast's FAQ today I came across this:

31. Approximately how long do you have to shake a 5 gallon carboy to get oxygen saturation (8ppm)?

45 seconds of vigorous shaking.

32. How long do you have to run a stone with an aquarium pump to achieve O2 saturation (8ppm) in 5 gallons of wort?

5 minutes.

[source]

I dunno about you all, but spending less money and less time for the same result sounds like a pretty good deal to me.

 

[apratsunrthd]

Maybe, but I have a wine degasser I use. Why? It's fast and more importantly, IT ATTACHES TO A DRILL!

 

[brettwasbtd]

I think stones are beneficial when connected to pure O2 - 8ppm is the cap for air. So shake until you get a O2 system

 

[hopsalot]

Chris White's book "YEAST" disagrees,


http://beeradvocate.com/forum/read/3720166

Methods of Aeration Observed O2 PPM
Shaking 5 min 2.71 ppm
30 sec, pure O2 5.12 ppm
60 sec, pure O2 9.20 ppm
120 sec, pure O2 14.08 ppm

 

[hopsalot]

This is pure O2 through a stone rather than using an aquarium pump, I got that confused, Wyeast is right

 

[bigbeergeek]

This is pure O2 through a stone rather than using an aquarium pump, I got that confused, Wyeast is right

45 seconds --> 8 PPM

5 minutes --> less than half that

How is Wyeast right?

 

[terrapinj]

look a few questions above though:

29. What are optimal levels of O2 in wort?

10-15ppm

better than shaking but not providing the ideal ppm esp for higher gravity beers

 

[hopsalot]

I dunno about you all, but spending less money and less time for the same result sounds like a pretty good deal to me.

What I meant to say was if you dont have pure O2, shaking is the better option.