Fitted gold scalemaster on mains but still bad?

[Gasinspect]

I now always use Hydrflo HS38 from BES. Used every kind of electronic and magnetic in the past and never worked, but so far all customers I have fitted Hydroflow have been pleased, over the last 10 years.
Not cheap.
Not as good as a softener but a great improvement.

Just make sure you follow instructions about checking for bonding connections.