how did the dye not work? were the plants already established before you put the dye in the water?

you can remove curly leaf mechanically but it'll keep growing and spreading until the water reaches the die off temperature. Cutting can help to spread the turions

How much of your pond is holding curly leaf? It is a food source for crawfish and turtles.

I usually just let mine go as it doesn't live in more than 20% of the pond

Mat Peirce
1.25 acre southeast Iowa pond
LMB, BG, YP, WE, HSB, RES, BCP