I ran across a non-prof website last night dedicated to preventing the practice of dying fish by injection. I was so hoping our species had not made the list; sadly no. After further reading, I came to the conclusion I need to watch FredFish pretty closely once he goes into the cycling-tears-up-my-patience tank.
I have also resolved not to buy any more fish from sources unknown. I will pay the outrageous shipping to deal only with reputable hobbyists & breeders.
If these "disco" fish are not purchased, there will be no profit & the practice will die an unprofitable death. The practice did pretty much die off thirty or so years ago but made a comeback. Seems people are not as concerned or do not take the time to do any fish-keeping research these days.
What really nailed it for me was the fact that some of the dying process uses carcinogenic chemistry according to the non-prof. Sad.