i was just reading another post about meds. people say they just put their fish in the QT and leave them their, if something develops they treat it.
personally i wouldn't see anything wrong with adding a little melafix, it can help aid in the fishes fins repairing or possibly catch any early stage fungus. however the other people say that sometimes using melafix when it's not necessary can make things immune to being treated by it later.
if you click on the search button and type melafix and read some of the posts that come up there will probably be many with people giving their opinions. many of them will have better advice than mine. i'm new to this too.
i would think the glo lights would be fine for awhile in the qt tank..the thing with schooling is that it just makes the fish happier, some fish will actualy get unhealthy, but most that school, are just more active, more colorful, and just better off when they are kept in a group. so i would think they'd be fine for a while.