I am going to be setting up a 66 gallon SA/CA cichlid tank and was wondering if I need to get a powerhead (without UG filter of course) to provide air to the tank, or whould it be better to get a plain old air pump and air stone. I will be using an AC 500 for filtration will that provide enough without a powerhead or pump, or should I get a powerhead/airpump? Thanks!