Can I house 1 bubble eye goldfish in a 10 gallon tank?
Of course, you can. It is just more difficult to keep fish in a smaller tank than in a bigger tank, because bigger tanks are more tolerant of their keeper’s mistakes. Let me give you an example. Let’s say, you are changing 2 gallons of water every week. If your tank is a small 10-gallon, it’s 20% change. For a big 50-gallon tank, it’s only 4% change. (I’m assuming that both tanks have the same number of fish, so the “volume” of water change is equal.) What this example indicates is that, with a tiny 10-g tank, you must be more careful about making sure the temperature and pH of new water are the same as the tank water. For a bigger tank, a small difference doesn’t affect as much, because it’s just a 4% change. On top of that, the oxygen level, pH, and temperature in a small tank fluctuates a lot more than those in a bigger tank, particularly the temperature. Fish doesn’t like temperature fluctuation, just like we humans are. So to reiterate my two cents, yes you “can” keep a goldfish i
