RV Digest-It holding tank treatment is a safe and natural cleaning product for your RV's holding tanks or portable toilets. This eco-friendly 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 a breeze.