Re: the question on QT, I always give my new clowns a freshwater dip after acclimating but before going into the quarantine area. I've rarely, if ever, have had any issues with this approach as most clowns are excellent osmoregulators and can handle the dip time (have done with caps, wild darwins, skunks, 'gasters, akindynos, etc...). However, I take a slightly different (not trying to indicate "better", though!) approach whereby I won't add any meds to QT unless the initial signs of trouble appear. There have been reports by some that copper baths may affect downline fecundity, so as my clowns are intended for breeding I don't want to take the risk of medicating unless warranted.
It sounds like you have a very thorough approach that works well, so my philosophy has been to stick with what works.