Enjoy your RV. Leave your RV toilet bowls to us. Enhance your holding tank while cleaning your RV toilet bowl. Make your RV toilet bowls sparkle with Unique Scrub-It, powered by black-tank-enhancing probiotics and enzymes! Cleaning your RV toilet bowl with traditional toilet bowl cleaners, which contain caustic chemicals ingredients, will hinder your black tank's ability to break down waste and keep odors under control. With Unique Scrub-It RV toilet bowl cleaner, you can remove stubborn stains, debris, and odors from your RV and boat toilet bowl while boosting your black tank with beneficial bio-enzymatic cleaners and it enhances septic activity in home and campground systems too. Disclaimer: Ingredient disclosures are to the best of our knowledge based upon information provided by our raw material suppliers.