Salt Free Water Softening Systems The NanoSoft Salt Free Water Softening System itself represents the utmost in environmentally conscious water softening/conditioning. You can enjoy water softened without salt or potassium. The All Water Treatments Carbon Vortech Series Whole House Water Filters are simply the best on the market. No where will you find a whole house water filter that is more affordable and removes more contaminates. With its multi-stage filtration process and high performance media you get sparkling clean contaminant free water for less than a penny per 10 gallons.