So what do you do with a frozen betta?
That's a great link. 2 AlkaSeltzers in a 10gal sounds more ethical than freezing the fish in anything that will fit in my icebox. Hopefully I will never have to intervene on behalf of a tortured fish again, but if I do, I will go with the CO2 saturation.
what a grim thread.
...earl-eye in the morn-in'!
It should be pretty darn dead if it's frozen solid. Dispose of the body by your preferred method and be done with it. I've found that cereal boxes make good coffins.
Chop off its head and put a stake through its heart if you're concerned about that sort of thing.