Microbe-Lift Liquid Biological Mosquito Control, 2 oz. For small water gardens, small fountains and other areas where water accumulates. Treats a 500 gal. pond for 20 months, treats a 750 gal. pond for 13 months. Controls Mosquito Larvae within 24 hous. Microbe-Lift BMC kills developing mosquitoes before they become breeding, biting adults, including those which may transmit West Nile Virus and Equine Encephalitis, and those which may transmit Heartworm Disease to dogs & cats. Microbe-Lift BMC can be applied to areas that can contain aquatic life, fish and plants. Microbe-Lift BMC can be applied to areas used by or in contact with humans, animals, horses, livestock, pets, birds, or wildlife.