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Biological Mosquito Control Dunks kill mosquitoes before they are old enough to bite. Mosquito Dunks float on water and will keep on working 30 days or longer under typical environmental conditions. While floating, they slowly release a long-term biological mosquito larvicide at the waters surface. The larvicide 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. Alternate wetting and drying will not reduce their effectiveness. For Use In: Safe for use in fish habitats Containerized standing water Flower Pots Tree Holes Bird Baths Rain Barrels Roof Gutters Old Tires Unused Swimming Pools Animal Water Troughs Etc Active Ingredients: Bacillus thuringiensis subspecies israelensis solids, spores and insecticidal toxins 10.31% Inert Ingredients: 89.69% Due to changes in shipping regulations, we cannot ship this item to California.
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