Summit Chemical Co. – Mosquito Dunks

The only product with BTI, a bacteria toxic only to mosquito larvae, that lasts 30 days and treats 100 square feet of surface water.
Non-toxic to all other wildlife, pets, fish, and humans.
Simply apply Mosquito Dunks® to any standing water, or water garden.
Kills within hours lasts for 30 days or more.
Labeled For Organic Gardening by the USEPA.
Highly effective low impact product