Hard water is what we call it when our mains water supply contains a lot of calcium and magnesiums ions. It happens when water passes through rocks and dissolves a little of them as it goes. As they are dissolved, salts from the rock separate into smaller particles with a positive or negative charge: these are ions. When you try to wash things in hard water you find that detergent and soap don’t foam so well and it’s harder to get things clean. Let’s find out a little more.
Nappy Leaks: Hard Water Made Easy
