Keep your RV or camper's septic system operating properly with the Camco TST Blue Enzyme Toilet Chemical 32-oz jug. It uses a specially blended formula that digests waste and tissue without using formaldehyde. This also helps reduce potential system clogs. Controlling odor for up to a week, this toilet cleaning chemical keeps your RV smelling fresh. It is suitable for use in all septic tanks during any season, as well as holding tank surfaces and probes.