3 In 1 Marine In-Tank Block Toilet Refresher

Keep your toilet fresh with every flush with Mr Muscle In-Tank Block Marine. Simply drop it in the tank, flush to activate and your work is done. It helps to clean and shine, while preventing odors in your toilet for up to 300 flushes. You will know it is working when the cleaning agent turns your toilet's water blue, leaving behind a fresh fragrance. With a protective, water-soluble film that keeps your hands clean when you handle the Mr Muscle In-Tank Block Blue, you can clean less and live more.