My middle son asked for fish for his birthday. So I got him one goldfish to keep in a bowl with some rocks and a plant. He complained that his fish was lonely and needed some friends. I said no. His dad said yes and bought him eleven more . Well, naturally, a one gallon fish bowl is NOT big enough for a dozen fish. So they've been dropping left and right. It's only been a week and we're now down to only one! Not the original fish either. So I'm hoping to keep him alive until I can get a good size tank and filter. Any suggestions?

FWIW, it's a goldfish. I was cleaning the bowl every day because it was getting nasty with all those fish in there. But now it's only one so he should be good.