i have a small pond about 1/5 an acre if that big. Deepest point is about 8 feet. Kind of kidney shape. i have channel cats and blue gills. The fish are 2+ years old. Last summer I had a big catfish kill.I finnally got power to the back and now I need to come up with an aeration system. Will a 3000gph pump sraying water be enough? Or do I need to spend the big bucks on a air pump system? I am surprized at how much pond aeration cost.