I cant come up with any ideas. QT is the best way. If you treat the main with Hypo or copper then you`ll lose all the invert life in your tank and the copper will cause you to probably never to have inverts in the tank again. Bite the bullet and QT your fish and leave the main fishless for 8 weeks. Just so you know you dont have to get another tank as a QT. A Rubbermaid tote will work just as good.