Just to be clear, with the tank transfer, only one of the two will ever be running at any given time, right? Siphoning out water to catch fish quickly thus handling them for maybe less than 30 secs a piece is far easier on them than hypo or copper for days. Their appetite is not affected, so they still get lots of energy during the process.
To be sure, it is a bit of work every 3 days for 2 weeks, but I've never lost a fish to ich since I've started QT'ing this way.
But it is just my preferred method. Just thought I'd throw it out there in case you hadn't considered it.
Good luck
