Camco TST Orange Power RV Toilet Treatment / 32 oz. helps to break down waste and tissue. Fresh citrus fragrance has been added to help control odors. This product contains no formaldehyde, and is non staining and safe for septic tanks. Our one step solution requires no mixing or preparation. Ultra concentrated - just 2 ounces will treat up to 40 gallons of water. Eliminates odors in the RV holding tank Powerful citrus formula Fresh citrus scent Ultra-concentrated 2 oz Treats a 40 gallon tank