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Mosquito dunks float on water and keep working for 30 days or longer under typical environmental conditions. While floating, they slowly release a long term, biological mosquito larvacide at the water's surface. This larvacide gradually settles in the water where it is eaten by mosquito larvae growing there. Mosquito dunks may be used in all types of standing water where mosquito larvae grow.
Surface Area of standing water Use quantity
1-5 square feet 1/4 dunk
5-25 square feet 1/2 dunk
25-100 square feet 1 dunk