Ideal for use in fish ponds, bird baths, gutters, rain barrels and other areas with standing water, these ready-to-use pouches dissolve quickly to release a larvacide that kills mosquito larvae before they have a chance to turn into biting adults that may transmit diseases. Dissolvable design means there's no dust and no mess from having to break open a package. Plus, this product can be safely applied in areas with plants and aquatic life, as well as areas used by humans, pets, birds and other wildlife.