Mosquito Dunks - 20 per Card

The Mosquito Dunks biological mosquito control contains Bti, which is a natural mosquito larvicide. This kills mosquito larvae, but is harmless to birds, fish, wildlife, and pets. Simply place a Dunk in any standing water to control mosquito larvae for up to 30 days. Each Dunk treats up to 100 square feet of surface water regardless of depth.