Enzytabs Holding Tank Treatment for RV, Marine, Camping, Billions of Enzyme Producing Bacteria Reduce Bad Odors and Liquefy Solids LIQUEFIES SOLID WASTES: Helps prevent holding tank backups by effectively degrading organic wastes including grease, starch, protein and tissue. REDUCES BAD ODORS: Provides long-term odor control by breaking down the organics that cause odors and preventing the return of odor-causing compounds. Fragrance FREE. It does NOT mask the odors. EASY TO USE: Pre-measured effervescent tablets. No mixing, No measuring, No spill, No mess!. ECO-FRIENDLY: Made with non-toxic ingredients. Not acidic, non-hazardous, non-corrosive. Phosphate FREE. Formaldehyde FREE. Ultra concentrated for less packaging. Safe for septic tanks. SAFE FOR ALL PLUMBING. 12-TREATMENTS: Contains 12 effervescent tablets. Each tablet treats holding tanks up to 40 gallons.