I do not aireate yet. Still trying to recoop from the construction cost. I do run garden hose in it from ten feet up to cool water and help with o2 about every other day. Visibility is good right at eighteen inches. Water is very low do to drought but still bout twelve feet in deeper areas, but fish seem healthy and are still feeding well for now. I was out right before dark fishing and we caught several yp and res and they all looked healthy, but we did see a lot more tadpoles dying on the surface. probably close to at least a hundred. They were not piping for air but it looked more like they were a hooked fish fighting. Kinda of like a struggle on top of the water with quick burst then flutter down then they would make a long quick run towards bank then go belly up. The ones that have been dead for a while looked bluish?