Eric,

On the subject of rain, aeration and turbidity let me state this. In my area, at least in my opinion, rainfall has not been a problem. The pond has dropped about 6 inches which I feel is normal for summer time. We did get a good drenching this past saturday.
My aeration experiment involves a compressor rated for double the output of the one I was using. I can run both diffusers simultaneously now and the water really "boils". I'm looking to reduce compressor runtime while maintaining proper mixing. Not knowing if the increase in aeration is causing any turbidity problems, I took a jar sample as noted above. Its been 24 hours and nothing has settled in the jar so far.

I hope to have some more information on the soil analysis tomorrow. I'll post anything new.