Duckweed is an unsightly and potentially dangerous problematic weed. The small circular leaved plant rapidly divides to cover the entire surface are of the pond. This cuts out light killing any submerged aquatic life     it also disguises where water starts and ends, being potentially dangerous to wildlife, pets and children. Duckweed Buster prevents the duckweed from taking up the nutrients it needs to grow, causing it to die back. Like all vegetative treatments we recommend that as much as Duckweed as possible is removed manually prior to treatment, this will avoid having a pond full of dead rotting duckweed. Treats 2,273 Litres.