I have a 3 acre lake that averages 6 foot of depth. It is entirely covered in coontail. I have been battling it for years. Im sick of pulling it out with the tractor every year and have give up on the grass carp I put in several years ago. Im gonna nuke it. I need to know what product is the best. I used Reward several years ago and had good results but it just grew back. Im looking for the most cost effective herbcide and the most environmentally sound stuff. There is livestock that waters in the pond but it can be moved for a few days. I eat the fish from the pond regularly as well. Any input would be greatly appreciated.