I recently Have been looking at some goldfish. I haven’t had them since I was younger but now own a few guppies. I was looking at goldfish and it says they get quite big ( the ones I saw) and I wanted to ask if a ten gallon would be to small a tank for one. If not would it be to small to possibly breed two goldfish. Farther more I was wondering if it would over populate my tank if I left then in with the eggs. I know guppies have tendencies to eat there fry and that keeps my tank from major over population. Would it be the same for a small goldfish?