MT Antical reduces limescale build-up in water supply elements by up to 76% No power supply, batteries, chemicals or filters required. It is easy to install and prevents costly limescale breakdowns in the home, as well as increasing energy efficiency. It uses a patented Turbulent Galvanic Polarisation electrode to interrupt the formation of limescale crystals in water heaters, showers, thermostatic cartridges, taps… It is easy to install and requires no maintenance.