well, my local boys and girls club has a severly OS tank (40G with 7 5-7" goldfish, 4 commons, 3 fancies) which I have been caring for off and on for the last month or so. both me and them know that their tank is very OS, and i've been seeking a home for 5 of those 7 since I first laid eyes on the tank. my LFS says they MAY have enough room to take 5 of them next week, but it's an iffy thing. now, I have a spare 10G sitting around since the FBT that inhabited it mysteriously vanished. I was wondering if it would be at all possible to keep the smallest fantail in the tank, who is about 3", in the 10G tank for 2-3 months until I can afford a 30G for him, and what kind of routine I would need to do to keep him alive.