Errr....why not just go buy a chunk of dryice, toss it in and close the
boat up?

One extra Oxygen molecule.

But it's not available is it? I thought it would be bound up and unusable.
We spray it on a fire to choke it out so I figured it may have oxygen but
it's not available. For that matter, water has oxygen too doesn't it? But
you can't breathe it since it's not available.

I may be wrong ... I'm just wondering.