before you purchase any "magnetic" or "catalytic" system that claims to soften water, do some research. Several states have sued companies like this for false or misleading claims.
I'm an engineer with a water purification company and have actually tested several "magnetic" systems, just for my own curiosity. None of them worked. The degree of hardness at output was exactly the same as input. Many claim to "realign the magnetic domains" of calcium, but calcium is a non magnetic element.
As far as I know, there are only a few ways to soften water:
Water softeners which use either sodium chloride or potassium chloride to exchange and remove calcium carbonate and calcium and magnesium sulfate.
Reverse Osmosis which is usually used for bacterial removal and is not applicable for whole house treatment.
And lastly, distillation, usually found in commercial applications and also not applicable for whole house treatment.
Be very wary of claims that use magnetics, and ask for specific technical data such as "If I have 12 grain hardness going into your system, what will the hardness be coming out?" I've asked that question of several of those magnetic companies, but for some reason they never reply to my querry /forums/images/graemlins/smirk.gif
good luck, anthony