For the most part it was. I read that I had to do that but was really hoping I wouldn't have to.I want to laugh at that, but I'm not sure if it is a joke. . . So, I'll say this:
The most humane way would be to put him in a bag with a bit of tank water and put it in the freezer. As the bag becomes cold he will become unconscious and then pass away. I would freeze him for at least a day to make sure he is truly gone.