Microbe-Lift BMC kills developing mosquitoes before they become breeding, biting adults. It is a liquid product, so it has no adverse effect on the aesthetics of ponds and water features. Microbe-Lift BMC can be applied to areas that can contain aquatic life, fish and plants. It can also be applied to areas used by or in contact with humans, animals, horses, livestock, pets, birds or wildlife. 2 oz treats 400 gallons for 2 years. 6 oz treats 2,000 gallons for 16 months.