Descaling system - Calcium & Magnesium increase sodium content

at a very good price

You don't look a gift horse in the mouth after all. What do the operating costs that are 10 times higher matter. Aside from the fact that about 3kg of salt per regeneration go completely unused into the wastewater system.

I believe he understood it, but now it is too late.

now it is too late

Nonsense. Emergency brake, remove system, sell off, buy new ones. This is a bottomless pit.