Superworm Frass from frass valley. My first 18 months I always had them around DE would work for awhile but they moved pot to pot even under the pots would find them. I was at the cannabis festival here in PA back in april. There was a vendor there selling it and had heard about it for compost teas so I grabbed a lb. After getting home and reading the bag had info on using it for gnats. Gave it a try top dressing all my pot and have not seen a flying insect since. I recently posted on FB about and have found out not insect frass will kill them. Good stuff and it's also 16 percent chitin. Do yourself a favor get some and gnats will be one less problem.