Why not stay away from harsh chemicals and go the organic route?
Introduce muskrats and snapping turtles to the pond. They both eat cattails.
MSC I agree with that completely. When I had muskrats my cattails and spatterdock were kept at eye pleasing levels. But when I got my dog Dolly they left. So I sprayed the cattails in front of my deck and what happens,,,I now have curly leaf pond weed that is too thick in place of the cattails. Now my grass carp may take care of that over time or maybe I need a few more. Every action has a reaction doesn't it.
