I ordered both kanaplex and ruby rally pro. Which one would you recommend I use when he is in another qt tank? I can also use nitrofurazone right now if needed.Moving it without having a medication to treat it with probably isn't a good idea. You other fish have already been exposed (if it is a contagious issue - doubtful). then, moving it increases stress, and with no treatment, it will just add to the stress of the disease.
You should probably set up the tank now to get it running, and then move the fish over and dose it with antibiotics at the same time.
Jay