One bag of dye in 10-12 gallons of water will treat 25-30 #3 size or 40-50 #1-3/4 size traps that are moderately clean. Bag contains approximately 20 oz. Renno's Natural Logwood Trap Dye is very similar to the logwood chips that were popular years ago with many old time professional fox and coyote trappers. It is derived from a certain s