Mosquito Dunks are the only larvicide with Bti effective beyond a mosquito generation (approximately one to two weeks). Safe for use in fish habitats and animal watering troughs, effective in controlling 100 sq. ft. of water for at least thirty days. Active ingredient: 10.31% bacillus thuringiensis subspecies israelensis solids, spores and insecticidal toxins.
Quantity: 6 Dunks