Camco USA's TST blue enzyme RV toilet chemical contains a new bacterial/enzyme complex that will digest waste, tissue, fats and proteins and only activates in the presence of material requiring digestion. Unlike normal enzymes, this new chemistry provides a stable product with a long shelf-life that is not temperature sensitive. It is designed to treat 40 gal with one 4 oz bottle. It contains a buffer system to prevent acid formation as well as septic odors and has a pure rain fragrance. All components are biodegradable.