Thanks guys. I was hoping the draw down would be more effective, but I can see that it is not from your replies.

I spent $500 a few summers ago to have an outfit come treat the water lilies. They used glyphosate and then came back a 2nd time when I told them the pond looked like it hadn't been treated at all; so they came back and said they were going to use something "slower acting", I believe 24D, and the 2nd treatment initially looked better, but the lilies came back within a month like nothing had happened.

I believe Navigate would work after using one bag of it, but from the small area that one bag treated, I would spend more money on Navigate than if I did the WhiteCap treatment.

So I'm a little gunshy about paying out another big sum to kill the lilies, but it looks like whitecap is going to be the way to go.

So you guys think a drawdown would be a complete waste of time and energy as far as dealing with the white water lilies?