Hi Dave,
The pump is throwing water about 18 inches into the air and landing in about the middle of the pond. It source is the strained intake at about the 8" level.
I have no O2 measuring equipment but know that the fish have never been at the top of the water trying to get air. I have seen this in some stagnant lakes.
I have two other pumps taking from down below and then dumping at about 6 " above the water line to add to the aeration pump. The sterilizer is also creating O2 as it dumps into the surface. Temp was 25 degrees C last I looked.
Thanks for your input-I know this is not easy to figure out.
