[o11c]

Um yeah don't use liquid oxygen.

But oxygen dissolved or otherwise absorbed in a material is fair game. Even without anything fancy, water can contain about 1% free oxygen, which is 8x what you could do with gaseous oxygen (which is in turn 5x what atmospheric mixture has).

And there are a lot of chemical reactions that can produce oxygen much better than 1%. The trick is going to be avoiding heat changes.

[hobs]

There's a lot of water so as long as my anal cooling fins project into the cooling fluid it sounds like I'll be down there for hours.

[jcgrillo]

> Um yeah don't use liquid oxygen.

You could probably do it once..