RV Digest It keeps the contents of your holding tanks liquid; that means NO back-ups;; while eliminating odors without making them with strong perfumes. Treat your tank with Unique;s RV Digest It and be amazed at the results. It Holding Tank Treatment is a safe and natural cleaning product for your RV;s holding tanks or portable toilets. This product will go to work on your camper;s toilet by putting billions of healthy bacteria into the holding tank that will biodegrade all of the contents that cause odors and backups and it will do it overnight. Special, expensive RV toilet paper, is unnecessary if you are maintaining your RV water systems with Unique RV Digest-It. We guarantee that all of your black and gray tanks will be flowing smoothly, including those using household toilet paper, after using this product. RV Digest-It will out-work other RV products overnight. Because everything is turned into liquid, dumping is always easy. Plus, if used correctly, it cleans sensors-guaranteed. Features;. Unclogs and deodorizes holding tanks overnight. Will digest and eliminate all types of toilet paper, no need to use expensive, uncomfortable RV toilet paper. Cost effective, only 4oz per treatment. Safe, bacteria;enzyme formula, contains no formaldehyde. Cleans black and grey water tanks, as well as sensors. Dimension - 6 x 6 x 11.9 in. Item Weight - 9 lbs.