A non-toxic way to help get rid of fungus gnats! Diatomaceous Earth causes the insects to dry out and die by absorbing the oils and fats from the cuticle of the insects exoskeleton. Sprinkle the diatomaceous earth liberally on the top of the potting soil and bottom water for best results. Apply as needed to all houseplants. Bring in your empty, clean jar and lid for a discounted refill - 30% off the retail price!