Natural & organic nematodes. Safe for people, pets and plants. Beneficial nematodes, the good bugs, hunts down and kills pest insects in the soil. Great for fungus gnats. Each jar contains 10 million beneficial nematodes and treats up to 285 square feet. Once applied, the nematodes in Scanmask will begin hunting down the pests in your soil, at soil temperatures at or above 55 degrees. Laval and adult insects are most susceptible to Scanmask. Scanmask hunts down insects like no chemical can.