I was over at the house of someone who has a saltwater tank last night. It really is a beautiful thing. He's been doing it for years and years (over 15), and has a great setup. He has, I would guess, about 7 fish, 4 cleaner shrimp, and all kinds of aenemones (I have no idea how to spell that) and corals and such. he even has a heater/cooler in his attic that controls the temps in the tank.

My girlfriend, on the other hand, has one 6-inch long goldfish