Toni, I totally agree, and I've faced this decision before with some of my other pets, including the dog I grew up with and my sweet China rabbit. It's excruciating, but I agree that it's part of being responsible for an animal you've agreed to care for.
I think Monstro is at that point. :sad
So, to euthanize one 3-inch fish, how much clove oil and how much vodka? I can buy clove oil at the local co-op in a 1/2 oz bottle or a 10ml bottle. Vodka I can get in the little "sample" bottles.
Andrea Z and the Z Zoo
(which, btw, includes (at the moment) four goldfish, two bettas, one clown pleco, five guinea pigs, four dogs, one cat, three rabbits, thirteen rats, and one husband
but as of Sunday it will have one less goldfish <
and four African pygmy dormice)