make sure the tank is clean all the time. if the fish starts breathing heavily thats a huge sign to clean it. do some reaserch on "ick" its a sickness that when white spots appear on your fish. it can easily be cured. keep it in a room with sunlight. always remember to feed it. usually you can keep a small plant and colorful rocks for the bottom of the fish bowl. if you have a fish tank i would also do reaserch on that too. keep baby fish away from the bigger fish. fish tend to eat them, even their parents.