Formula X-10 Fish Feeding Stimulant is a stunning new product designed to increase the effectiveness of natural and artificial fishing lures . Fishing guru, Charlie White and researchers from the University of Washington's prestigious School of Fisheries developed Formula X-10 through years of study on fish behavior. Just a few drops of Formula X-10 on or in your lure will increase that lure's attractiveness by adding powerful scent properties designed to attract aggressive game fish.