The pond has 3ac of 3'-4' water 2ac of 4-6' water and 4ac of 6'-10' water and receives a good amount of wind as it has trees on only one side- small spring but most water is run off. The shallow water is on the south end and deeper water is on north end.

Would you install diffuser aerator in the deep water and surface aerator in shallow water? Or would you only aerate deeper water. Is there any reason to aerate the 3'water?