What is the latest in water conditioning that uses no salt and does not use magnets? I would like info so that I can guide a customer in whether to buy or not.

Pelican makes about the best water softener on the market. They are at: Salt Free Water Softener - Pelican Water Systems (http://www.pelicanwater.com/salt_free_water_softeners.php?gclid=CJrfjoOD568CFQ da7AodKFgp5g)

How does it take the limescale from the water?

I don't know how they work. Go to their web site.