True, definitly not an ideal situation as many have stated. Is there any one near by with an established hydroponics system that you could borrow or trade some filter media with? I would think if you could get a gallon of media from even an aquarium sump it might put you a little bit ahead of the game.

Also remember that fish can go long periods without eating. I wouldn't bother unless they got really aggressive and smaller fish started to dissappear.