What is the Difference of Hard Water and Soft Water?

Hard water contains large amounts of calcium and magnesium – two minerals that cause the soapy scum on glasses and lime residue on bathroom fixtures. While suitable for drinking and gardening, hard water can cause mineral build-up in water heaters, pipes, dishwashers and showerheads, reducing its flow. Soap and shampoo’s ability to lather is reduced, and laundry becomes stiffer and duller in appearance.