The different uses of magnets and their relative values are very controversial. A neighbor put in a rainwater collection system and treats his water using a number of filters, ultraviolet light, AND a couple of shiny magnets strapped to the pipe. We had a carpenter do some work for us who had a bracelet with small magnets on it. You can buy necklaces with magnets, belts with magnets, corsets with magnets, ankel wraps with magnets, shoes with magnets, seat covers with magnets, mattresses with magnets, etc. Perhaps you've noticed the ads with magnets that you wrap around the gas line on your car to give you increased gas mileage? The position of the federal government after extensive testing is that if the magnets do perform as claimed, the performance is so slight that it is not measurable. However, many people swear by them, so "You pays your money and you takes your chances."