Good Luck
I think you said you have water falls to keep some alge in check a couple of #8 bare copper wire in falls will give you some help or a floating corker pvc and copper wires in pond
Scott Trava
Catskill Pond
http://catskillpond.com
scott@catskillpond.com

Copper wire? really? Never heard of a floating corker pvc, that something I would make?

Did you ever hear of this pond magician stuff?
http://www.effens.com/pond-magician.php?gclid=CJqpgOWJ-pQCFQQrFQodth93qw
sound desperate dont i \:\)