Mosquito bombs kill mosquito larvae in standing water. Each bomb works for up to 64 days. Larvicide treatment that can be used around people and pets in all water-holding receptacles where mosquitoes may breed. Ideal to use in bird baths, fish ponds, animal watering troughs, rain barrels, ponds, and more. Prevents developing mosquitoes from becoming breeding, biting adults. Active ingredient starts to release immediately into the water. Each bomb treats up to 1500 gallons of water. Can be used in areas that contain aquatic life, fish, and plants. No floating debris.