ya IF I have to resort to "puting a little guy down" then freezing is the way I go too...was just curious about the vodka thing. The post didnt really go into detail about what would happen if you messed up :O
Only times I have euthanize any fish was 2 now of the guppies I adopted from my boss [over populated community tank of male and female guppies + an algae eater] Appears they let a good handful of females over-feed, and they now are very bloated.
1st euth-fish: dropsy attack so bad she could do anything...could only swim staight up and down, and appeared to be very stressed.
2nd fish: stayed in same spot for 2 days due to dropsy attack, and wouldn't move. Very labored breathing, very pin-coned, refused to do anything.
there was another female that actually passed by herself due to being so constipated [just started pin-coning around tummy]..she actually started twitching, and kinda siezuring out. I hate to see it get to this point, nor let them suffer threw that...why I usually just help them do it faster by freezing them. Her case...happened to fast to prep.
as the tank was already over populated, and theyalready showed signes of damaged internal parts...thought this was best choice for all the fish.