We have hard water that leaves calcium on the shower door, dishwasher, etc. My wife would like a water softener to help with this problem. However, the bit of research I've done reveals that water softeners have a few disadvantages like salt in the water, etc. Also, I do not have a drain in my garage for the regeneration cycle required by salt type water softeners.
Therefore, is there some sort of newer, alternative technology to soften the water, ie, get rid of those annoying minerals, etc, that someone would recommend?