I went ahead and moved my aerator to the shallow end a little closer to the overflow, I doubt that I will get a overflow situation but I can only hope that the pond gets that much rain. I couldnt get the magic number of 3 feet but I did get 27 inches from the surface down to the diffuser.
I started to just shut it down but I felt like a criminal doing so since I think it has greatly improved my pond, I know simple mind thinking simply,

But we will see.
I am going to watch temps for the next few weeks, heck we got up to 70 degrees to day and 65 tomorrow, Gotta love the midwest!
Still havent found a resource for the Sonar PR, anybody know of a online source that I could check out