Mites can be a problem in fruit fly cultures, roach bins, and in the bins of other insects. Our Mite Powder is an all-natural powder from Pritchett's Small Pets that will stop bugs in their tracks. Made of diatomaceous earth, Our Mite Powder will form a deadly barrier that will kill all kinds of small insects and other invertebrates as they walk over across it. Simply spread a thin layer of our mite powder around the base of your vivarium and prevent escaped fruit flies from crawling off! A small amount of our Mite Powder around the base of fruit fly cultures will prevent the movement of mites from culture to culture. Mite Powder is also great for protecting your vivarium from ants! The powder is so fine that when anything walks across it, its like millions of razor blades chopping them up. This is safe around pets, and your children. Don't use it in your reptiles enclosures though. Sold by the ounce.