Camco TST RV Toilet Treatment - 32 oz. -
For over 40 years RVers have trusted the odor-stopping power of TST.
The name TST still guarantees the highest quality in sanitation treatments that contain no formaldehyde, are non-staining and are safe for septic tanks. Eliminates odors and lubricates sensors. 100% biodegradable and environmentally safe. Original formula takes only 4 ounces to treat an entire 40-gallon tank in any season.