This Microbe Lift BMC fully treats any area with standing water that serves as a breeding ground for mosquitoes. It consists of natural bacteria that are toxic to mosquito larva, killing mosquito populations at their source. Because these bacteria are only toxic to the target pest, they pose no danger to fish, pets, humans, or vegetation. It fully penetrates the entire depth of the water treated, and it has no negative effects on the aesthetics of the areas in which it’s used. One teaspoon treats 540 sq. feet of water.