Kills mosquitoes before they're old enough to bite
The only product with bti, bacteria toxic only to mosquito larvae
Lasts for 30 days and treats 100 square feet of surface water
Non-toxic to all other wildlife , pets, fish, and humans
Labeled for organic gardening by the usepa
Use Mosquito Dunks in any standing water including rain barrels, bird baths, tree holes, elevator shafts, planter reservoirs, rain gutters, etc