When you are eating or just relaxing outside always remember (along with this product) that a good strong outside fan will be the best protection from mosquitoes. They do not like to fly in a breeze.

Mosquito Dunks float on water and will keep on working for 30 days or longer under typical enviromental conditions. While floating, they slowly release a long-term, biological mosquito larvicide at the water's surface. This 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 sites where mosquito larve grow. Alternate wetting and drying will not reduce their effectiveness.