Thanks for all the thoughts. I don't have much sense of how stable I can keep a TTM / QT tank for a long period of time. Doing a fallow period for my DT and keeping a hospital tank up seems to be impossible for me at the moment. It seems like I can go for 2 weeks with Prazipro to get rid of most things other than Ich. If I truly get Ich in the future, I would probably best do the TTM + 75 days of fallow. I think it would be ideal to do it now, but with work and travel coming up, and the lack of equipment for a true QT tank, I don't think I'll tackle that. I'll try to get rid of everything else with the two week prazipro treatment, and then go for a TTM/Fallow period in the future if needed. I'll probably need to setup my 40G breeder, get an ATO setup, some kind of filtration for it, and then double that for the other tank for the TTM. Just not enough time/space at the moment. Maybe that's irresponsible?
Not irresponsible. As long as you know what your risks are then it's really about risk tolerance and how much you want to take.