Sue,

Thanks for the advice, I didn't see your comments until after I posted to Burger. I may have some nutrients from runoff but probably not much. It's an old cow pasture converted to home sites. I've noticed a considerable reduction in sludge so I know the aerators are doing their job, my problem is getting rid of the FA until the nutrient problem is gone.

Scholars have long known that fishing eventually turns men into philosophers. Unfortunately, it is almost impossible to buy decent tackle on a philosopher's salary. ~Patrick F. McManus