Beautiful setup you have there Mouch, nice prairie pond setup. Reading your water quality info and the other details on stocking and depth, I have to ask you why you think you need aeration? Solar powered anything is going to be a heavy outlay of cash and the description you paint of your pond isn't the typical nightmare algae/fishkill variety. Bottom diffused aeration isn't efficient in waters 3-5' deep and requires high volume of air to promote circulation... which is 2/3 of your pond. Aerating the 9' portion would work, but the pond is basically new <2 yrs from being dried out and only has 130 stocked fish? Did the '08 drought dry it completely or only a portion? You didn't mention what the acerage is, but from the photo it appears to be 10+ acres? I'm thinking a dissolved oxygen / temperature profile of your pond would give you a good idea of whether you need aeration or not and save you some money by identifying the problem areas of your pond. Spend a small amount of money now to save you a lot of money later.