Prolong the service life of your toilet’s waste-holding tank and grey water tank with Duo Tank Cleaner Concentrated. This powerful cleaner for periodical application is an essential maintenance product that does not require any scrubbing and is easy to use.

• 2-in-1 maintenance formula
• Removes limescale, encrusting and grease deposits of black and grey water tanks
• Prolongs the lifespan of the tanks