Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Phragmites, watershield, and lilies. Oh my.

Hi im new to this site and posted some questions and was told I might want to repost over here. We have been having major issues with phragmites in our pond which 300x400 and approximately 30 ft deep in the middle. We have cut them down and had our pond guy treat the pond didnt work. We have dug them out with a loader that just seemed to make it worse. Alot of people around Here have been telling us to use Karmex but ive been hearing alot of bad things about that. yesterday we cut and burned all the way around the pond and would appreciate and input on how to deal with this problem before they start growing back.