Ha! I got a 28 cube to use as a QT and couldn't resist turning it into another display for my office. Couple of thoughts: When it comes to cycling the QT, you can keep a filter sponge in the sump of your main tank, then put it into the QT when you need biological filtration. A second and more radical (let the flames begin) is to ditch the QT altogether and feed all your fish with something like Seachem Focus and Metronidazole for a week or two when you add something new. I've used it to clear ick from a new arrival and found that other fish benefited, too. The Focus helps the Metronidazole bond to the food so the fish actually take it in.