Back by popular demand is the oldest, most trusted name in sanitation. Waste Digester is a formaldehyde-free, environmentally-friendly, 4-in-1 blend of powdered enzymes that breaks down and liquefies waste, paper, grease, and tank residue. One 2-oz. pouch will control odors in a 40-gallon holding tank. Highly concentrated cleaner is non-hazardous, non-staining, and safe for all RV tanks. Contains eight 2-oz. pouches per package. Breaks down waste, paper, grease, and more Non-hazardous and non-staining for all RV tanks | Travel Jon Waste Digester