Question

How frequent do I need to replace the anti-calc cartridge?

Answer

It depends on the tap water hardness in your area.
During usage, the colour of the material inside the anti-calc cartridge changes from blue when the anti-calc cartridge is new to brown when it has been used for some time. When the anti-calc cartridge has turned completely brown, you have to replace the anti-calc cartridge with a new one.

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