This Camco TST (TM) Waste Holding Tank Treatment with orange scent deodorant treats 40 gallon holding tank. It comes in 4 ounce bottle and is sold in set of 8.

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. 100 Percent biodegradable and environmentally safe Single-Dose Treatments Require No Mixing Or MeasuringHarnesses The Power Of Citrus To Stop Odors And Break Down Waste In Your RV Or Marine Waste Holding Tank

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