I recently bought my first fish to keep in my dorm. He would swim up to his food and try to eat it, but always ended up spitting it out. After 2 days, we brought him back to Petland and they decided he had a fungus and gave me a new fish. Now this fish won't even try to eat the food. Could the food be the problem? Or is it me? Or are fish just always this much of a pain in the butt?