I have a 29 gallon tank with a topfin 60 HOB filter running at almost full speed. I have a fancy comet, a common goldfish (I think), and 3 cory catfish in the tank. I have a 23" bubble wand along the back of the tank. Do I need to run the air pump all the time? The fish do not seem to mind if I turn it off. The noise from the pump and the bubbles keeps me awake at night but if it needs to be on, I will deal with it. Any advice?