Features Kills mosquitoes before they’re old enough to bite Biological mosquito control – kills Mosquito Larvae, nothing else Slow release, long lasting - Kills mosquito larvae for up to 30 days Easy to use – simply drop one dunk in standing water per 100 square feet Slow release of BTI – a beneficial bacteria that only kills mosquito larvae Dunks can be broken into smaller pieces for smaller areas Use in fish ponds, rain barrels, rain gutters, animal stock tanks, flooded crawl spaces, any place that has standing water Specifications Quantity:6 Application: Insect Repellent