Can Magnets Descale your Pipes?

Diana O'Carroll

In this Question of the Week, we find out if a magnetic field can stop pipes from clogging up with limescale?  Many manufacturers would like us to believe that simply clamping a magnet to your plumbing is all you need for clean, free flowing water, but is the science on their side?  Plus, we ask if the planets and stars align to make you weigh less at night!