Using machines like Jenson Lake mower and Jensen rake will surely be very effective in removing cattails with their root system. In addition these machines are effective for both small and large ponds.
This is good to know. TIP for ants: Get Rid of Ants: Put small piles of cornmeal where you see ants. They eat it, take it 'home,' can't digest it so it kills them. It may take a week or so, especially if it rains, but it works and you don't have the worry about pets or small children being harmed!