I do not want scale, but even more so, I do not want to clean the showerhead and flush the system for 30 minutes and refit - only for the missus and me to have one shower each, and then need to start the whole cleaning process again. I will reiterate, the scaling still happens, only it does not build up on the element as it normally would.
The scale is released through the system slowly, mostly as little specks which fit rather too conveniently in the holes on the showerhead thus causing it to piss out at stupid angles rather than on top of the person standing underneath it.
I had thought about fitting a filter to the hose but imagine that this would block even quicker than the head, causing the shower unit to overheat and cut out.