I don't aerate, I rely exclusively on algae blooms. However, we have completely different bodies of water. Considering you secchi disk readings, I would be inclined to favor more aeration. The clearer your water becomes, the less you will have to rely on aeration. Mud bugs will ensure you always have turbid water to a degree, necessitating aeration.
Also, the bottom of your pond is the key to the water quality. How thick is the muck on the bottom?
To state it simply, I don't have a clue
