This Automatic Toilet Bowl Cleaner works hard to clean your toilet so you don t have to. This 1.6-oz cleaning cube is easy to use. Simply drop it in the tank and the X-14 Toilet Bowl Cleaner does the rest. It works hard to clean and deodorize the toilet with powerful detergents every time you flush. This product is safe for septic systems when used as directed. It leaves the water in your toilet bowl blue and the bathroom fragrant for up to 4 weeks.