Well, I got a fantail goldfish and a 10g.

I realize perhaps that this isn't the best choice, but if Ghettoblaster survives and grows in the 10g, I might have to invest in a bigger aquarium.

I kind of want to get him some fishy friends (which I'm sure none of you will be very pleased with, considering the advice I've already gotten). Petco says he won't get along with anything but Koi, but I really don't believe that -- would he get along with a guppy/guppies?