At first, Chris Matthews thought a flu bug had hit his entire family last week when they started to feel nauseous and experience eye problems at the same time. But when the family's two dogs started to show symptoms, Matthews knew something was wrong. Matthews had cleaned out the aquarium inside his house in Steventon, England, a day prior. The 27-year-old was transferring rocks and other items from the fish tank into another container, so he could clean each item individually. When he was finished power cleaning the tank, Matthews shut the door and went to bed. The next day, Matthews and...