Super Descaler I for all insets to be decalcified now. Chrome shower hoses with calcium deposits are overnight as new (so far I have always bought new). Aerators of Wasseramaturen, coffeemakers, irons and kettles are as good as new. The permeated descaling I still use for cleaning thermos flasks. The are a mirror finish again. Easy to dose, readily soluble in warm water. And 1,000 times cheaper than DURGOL.