Hello all. I have a .18 acre pond approximately 8 ft deep at center. 6ft average.advice is appreciated.
Sorry,missed water depth.
With 8ft depth and 6 ft avgerage with electricity on site,perfect for surface aeration. A properly sized Kasco unit will pull water from those depths and create a wake greater than a bottom diffuser system.
Disclaimer: I don't sell stuff -only share experience.

In 6ft of water in our 2 acre pond, we have a clean hard clay bottom that is posible only by drawing water from the bottom.
Surface aeration creates O2 - bottom difusers circulate water. Sratification, IMO will not be a problem ina "shallow" .18 acre pond.
Good luck,
George