I have a 5 gallon fish tank and my fish keep dying. What is going on?

IT s probably ick. Raise the temperature to 80 degrees. You can also buy aqaurium salt and ich medications. No, fish shouldn't die off like that without a bubbler. That isn't your problem unless you have really low oxygen levels. Hope I hlped! Oh yea, what is your ph, nitrites, nitrates and ommonia? Call your pet store. SOme of them will check your water for you.