If I am not mistaken and I am a novice at all of this pond stuff, I do believe milfoil is similar to parrots feather...my 2 acre pond was half infested and I have found there is only ONE way to tackle this stuff and that is ripping it out by hand. I am just over forty and my body is aching from pulling this stuff out and heaving it to the shore...for the past three days!!!!!!!! I am not a snake guy and I have ran across 7!!!!! I crapped my pants all 7 times!!!!! Do not believe people when they say snakes are more scared of you. These snakes are curious. Snakes love parrots feather!!!
Rip it out by the roots by hand, its the only way. AND, invest in the Big Tooth Lake Rake its perfect for the mats. And get plenty of Ibuprofen. But the results are beautiful!