Join Date: Oct 2010
Location: Victoria, Australia
Yeah I agree. If it is mycobacteria it is best to cull. There's no 'giving them a chance' as there is no cure for it and it is inevitably fatal. Seen a few rainbowfish breeders run into issues with it and have to euthanise entire tanks full of fish, even the seemingly healthy ones.
It can also be transmitted to humans and cause potentially serious problems. That alone for me would be enough to make me not want to have any infected fish in my fish room.