I agree the freezing method doesn't work too well... i watched a friend of mine put down his fish using this method and i swear after 5-10 min the fish was still alive which led me to believe thats not the best of ways to do it....
I think the Clove Oil + Vodka method would probably be the best and most humane way to put a fish out of its misery...
I think the Clove Oil + Vodka method would probably be the best and most humane way to put a fish out of its misery...