Mosquito Dunks "Kills Mosquitoes" - 20 Pack

Mosquito Dunks Mosquito Dunks float on water and will keep working for 30 days or longer under typical environmental conditions. While floating, they slowly release a long-term, biological mosquito larvicide at the water's surface. This larvicide gradually settles in the water where it is eaten by mosquito larvae growing there. Mosquito Dunks may be used in all types of containerized standing water sites, except finished, treated drinking water, where mosquito larvae grow. Alternate wetting and drying will not reduce their effectiveness. Active Ingredient: Bacillus thuringiensis subspecies israelensis solids - 10.31% Product Label