Aquacide Pellets - Easy to Apply Herbicide 

Aquacide Pellets with 2,4-D are a selective, root killing, systemic herbicide. Controls submersed, emersed, and floating weeds. For use in ponds, lakes, reservoirs, bayous, drainage ditches, non-irrigation canals, rivers and streams that are quiescent or slow moving.More - http://www.killlakeweeds.com/products/aquacide-pellets