I have just come back from the Bio Market in Ferney-Voltaire, where I met with the nice people from Acfer. Acfer, or Ambarrois Chaud Froid Énergies Renouvelables is a family run company specialising in CO2 reduction technologies, based in Amberieu en Bugey.
They also have an interesting looking water treatment device, which doesn’t need electricity or salt, but isn’t one of these extremely dubious sounding magnetic things.
They will study your needs, and make a proposal including installation.
The one thing I really like is they won’t sell you anything they haven’t tried themselves.
You will need to speak French to do business with this company.