Unique RV Digest-It is a safe and natural cleaning product for your RV holding tank and portable toilets. This eco-friendly product will go to work on your RV or camping toilet by putting billions of healthy bacteria into your holding tank that will break up all of the clogs that cause odors and backups. And it will do it overnight! If you are using special, expensive RV toilet paper, you can quit 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 supplies overnight. And it cleans sensors!