That totally sucks. Sorry to hear. I agree about all the views expressed with QT. I think it's a good idea in practice. I do a modified QT
Here's my rationalization, wrong or right or somewhere in between. My QT consists of a full tank change every 72 hours for two weeks. So a full cycle of the TTM. That, in theory should get rid of ich.
If anything else should show, I figure the stress of that should make it apparent and I can deal with it. If nothing shows in that two weeks, into the display it goes.
I've tried a full 6-8 weeks QT and I've not been able to do it. That's when I've killed fish. So far since I've done the TTM, I haven't lost a fish due to my negligence, and I actually have seen few sick fish. Prazipro has been able to take care of anything else so far.
But I know the TTM isn't easy if you don't have a fish room or somewhere you can set up an entire system...