Ok, the latest..It seems to be dissipating somewhat. I called the ag extension agent and he told me it was probably some kind of brown algae and that he had had several calls asking about the same thing so it seems to be somewhat local to NW TN.
He suggested aeration as have several folks so I have an aeration system on the way. I had to go with the ebay vendor who seemed the most knowledgeable (who also called and talked with me at length about his systems.) It was actually in his post where I noted that too much aeration too quickly could be dangerous.
As soon as I get something going, I'll post more. You folks have been a big help and thanks muchly.

I'm also wondering if the fluridone may be having some effect?

Last edited by bobslp; 07/19/11 08:51 AM.