Profiting off pain

A father finds his son's tragic story being used to sell a questionable product that claims to remove everything from pesticides to bacteria, including E.coli, from your food. We put that device to the test and discover not only is the product we bought no better than tap water it's outright dangerous.

• Watch the full Marketplace episodeFriday at 8 p.m. ET, 8:30 p.m. in Newfoundland, on CBC-TV and anytime onCBC GemorYouTube.