After doing some research I believe the previous picture is Widgeon grass. Now for the plan to remove about 60% of it. There is a 6 foot wide drag harrow at the farm. It’s the kind you can hook over a ball on a atv, utv, tractor or truck. The plan is to drop the drag on the inlet side (190 yards) of the pond connected to cable/rope attached to the utv, truck or tractor on the dam side of the pond. Then drive out to the 200 yard shooting target. This will pull the debris to the top of the dam. Next step is to remove debris from drag, unhook clean drag from cable, take drag back to inlet side of pond and repeat until approximately 60% of Widgeon grass has been removed. Has anyone had success using something similar to this?