Hard water is simply water loaded with extra minerals, mainly calcium and magnesium. It’s like your water went to a rock concert and came home with a bunch of groupies.
These minerals aren’t harmful to drink—in fact, they can even be good for you! But they love to settle on surfaces, making your glassware spotty and your shower doors look like a snow globe exploded.
So, how do you test for this mineral-heavy party crasher? No fancy science degree required. Grab a few household items and let’s get curious.
