Mosquito Dunks Mosquito Killer Tablets, 6-Pack an all-natural solution for controlling mosquitoes outdoors. Designed for easy use, simply place these mosquito dunks in any water garden or standing water to effectively reduce mosquito populations. Each tablet works for 30 days or more, providing long-lasting protection. The active ingredient, Bacillus Thuringiensis, targets mosquito larvae without harming other wildlife. This ready-to-use pack includes six individual tablets, making mosquito control simple and convenient. Model Number: