[quote=“tom sawyer”]Gas doesn’t sit in layers for long. Brownian movement causes it to mix. As long as CO2 is being produced you have positive pressure and saturated liquid and things are safe. After CO2 production tapers off, if the bucket is well-sealed you could be OK for some time. A lot of mine don’t seal that well and in those the head space is going to be replaced by air pretty quickly.
I’ve just been looking at my methods from a standpoint of reducing oxidation. I’ve seen a lot of beer judges ding homebrews for oxidation, and I think some of mine have had this problem. Especially the malty beers. Its not a huge issue but just one of those things that keeps some of my brews from being as good as they can be.[/quote]
Ahhh, Brownian movement…of course. I kid…I kid. Great explaination. Thanks.