Dr. Cup lime out 1 litre Geräteentkalker

Amazon.co.uk Price: £12.67 (as of 01/06/2019 19:58 PST- Details)

Descaler for small devices such as hot water heaters, coffee makers and Samovar
Repeat with color indicator for assessing effectiveness, “red” operation
Special corrosion protection for the maintenance of the water-carrying parts