halfastro, You know I've been wondering the same thing. It's a great question! I've been told that clearing ponds in area's that have say a lot of red clay is only a temporary remedy. That it will have to be repeated every year or so no matter how much grassy shoreline you have and even though there is not a large amount of clayee run-off going in your pond. Maybe someone here has had lots of experience with different ponds to give us some good info on what to expect...du