yup absolutely. however, i think different yeast strains do have greatly different oxygen requirements. i've never had attenuation issues before ever, even on big beers or meads. i am struggling right now with WLP500's attenuation, and the only variable i'm missing is pure oxygen.
Yes, different yeast strains have different O
2 requirements, but most of the strains available to amateur brewers are O1 or O2 with respect O
2 demands. How are you aerating? Are you using a venturi? Splash aeration will get one to O1 (half air saturation) at best. A venturi will get one to O2 (full air saturation).
Here is what I use to aerate wort:
![](https://i.imgur.com/iEDSfAQ.jpg)
It is a piece of racking with holes drilled downward in the flow of the wort. It functions as a venturi even though it does not look like a traditional venturi. The device is placed vertically at the end of the tubing draining one's kettle into one's fermentation vessel. The inside diameter is 1/4". When used with 5/16" or 3/8" tubing, the wort pressure flowing through it drops while the flow rate accelerates. This phenomenon is known as the Bernoulli principle. The result is a vacuum that draws and mixes air through the holes. If used correctly, it will create a head of foam large enough on top of the wort that one will have to slow down the flow in order to allow the foam to dissipate. When dealing with yeast, foam is good.
By the way, if you want to learn more about O
2 demands, here is a link to Brian Kirsop's seminal paper on the subject:
https://onlinelibrary.wiley.com/doi/epdf/10.1002/j.2050-0416.1974.tb03614.x