Dan Serena has a cool video on his site showing water reacting to a powerful magnet. He attained the magnetic water by taking a cup of water, mixing in lime juice and spinach leaves, and letting it sit in a fridge over night. The Vitamin C from the lime juice extracts the iron from the spinach leaf so that the water is laced with enough to make it magnetic. I can't actually tell if the video is real, but it's convincing enough that I'm throwing it up for you to judge. Recreating the experiment would be simple enough, but I'm not some rich fat cat that can go around wasting limes and spinach. That stuff doesn't grow on trees you know.