I'm interested to hear more about clove oil.
I'm rather attached to my fishies, and although some might find it silly, bashing or stabbing them really does make me feel uncomfortable. I'd do it if it really was the best way though.
I put this boy in the freezer because the other fish had taken out one of his eyes, and half his head. He was gone, but still the odd gasp.
I volunteer for a breed specific rescue org (dogs), and I see horrid inhumane treatment at the hands of people. If I have to take a dog for it's last ride to the vet, then humane and gentle is my priority. I'd hope to do the same for my fish, as silly as it may sound.