Hi Rainman, the good news is the pond has only had a slight weed control for Cattail. I got into trouble for saying this before, but I used Defender bought at Walmart for less then $10, mixed 4 oz. to a gallon and it worked great. The pond is very clear because I don't have anything in the pond that would stir up the bottom. It is wonderful to walk around my pond as see pond life as if I was looking into an aquarium and even photograph it.
John, we just don't want to suggest violating Federal Law by using a product other than it is labeled for...that is exactly why the label says, "It is a violation of federal law to use this product other than described...". That $10 Defender gets expensive after a lawyer and $25,000 fine in Federal court.
