Dometic Premium Holding Tank Treatments 12 Pack Drop-Ins -
Offers the most powerful, longest-lasting control of tank odors without formaldehyde.
Additives break down waste and help tanks rinse cleaner during pump-out. All-season use—won’t break down in hot conditions. Concentrated—only 4 oz. liquid or one drop-in packet treats 40 gal. blackwater waste tank.