Mosquito Dunks BTI Larvae Control 30-Day Standing Water Treatment Safe 6-PackMosquito Dunks 6 pack kills mosquito larvae before they bite. BTI bacteria targets larvae only, lasts up to 30 days and treats 100 sq ft of standing water per dunk. Safe for pets, fish, wildlife & humans. Ideal for ponds, birdbaths, water gardens. EPA labeled for organic gardening. Key Bullet Points: 6 pack Mosquito Dunks with BTI larvae control Kills mosquito larvae in standing water up to 30 days Each dunk treats up to 100 sq ft of surface water