TOILET DEODORIZER WITH REACTIVE ODOR-ELIMINATING TECHNOLOGY: Experience a powerful RV odor eliminator that stops RV black tank odors for up to 7 days. Just 2 oz treats camper toilets with up to a 40-gallon tank. SUPERIOR FORMULATION, UNMATCHED PERFORMANCE: Get exceptional results with TST MAX RV tank treatments. The advanced chemistry is safe for septic systems. POWERFUL RV BLACK TANK TREATMENT: Eliminate clogs & odors in your camper/marine black water tank. This liquified RV black tank treatment breaks down waste & RV toilet paper, while also aiding in waste digestion for optimal sensor performance. MULTI-PURPOSE: This RV accessory is great for boating, full-time/occasional camping, boondocking, & portable camping toilets. Be sure to have this camper must-have with the rest of your camping supplies. MADE IN THE USA: Camcos TST RV toilet chemicals are proudly made in the USA & trusted by RVers and boaters for their holding tank treatment needs. REFRESHING SCENT | QUANTITY: Enjoy a pleasant, long-lasting citrus scent as you’re RVing without worrying about septic tank odors ruining your experience. Each jug includes 1-gallon.