Thanks Bill..So you're saying this is normal to have high amounts "surface" after an Alum treatment? Wonder how I can help eliminate that?? The entire area is grassed including the 2 sediment ponds it comes into first. neither has held water long enough to affect the growing grass. Maybe I have a grass that is not suitable for this purpose. I'm wondering if maybe making one of those into an artificial wetland marsh-type deal if that would help filter more organics out.. Humm.. More money..

Last edited by Snipe; 03/17/19 11:13 PM.