Will one of those big vases with a plant in it do? I also know someone with a large goldfish bowl that is not in use (and hopefully never will be again) and they also have a large (probably 1-2g) fish container and extra gravel, and I'm sure they'd let me borrow it. I could also buy a few live plants to provide oxygen and "eat" some of the ammonia. I could do 50% w/c every day to keep the ammo and nitrite low, but I don't know how I could keep the temp up. And how could I adjust him to the warm aquarium?