So then it would make sense that 'TTM' should be re-written to include these things - or do you only do this once you see a problem. Example I buy 5 fish. on day 3 of TTM, one of them developed what looks like velvet what do you do.
I do it the day I receive them unless they are delicate enough to warrant an observation tank to get eating and destress first. Even if they are going in observation they get a peroxide bath first, all fish get this.
There is a hybrid TTM method that can be found on humblefish's forum (I think it used to be posted here too, might still be).