Imagine your water is a fancy cocktail. Calcium is just one of the ingredients. Too little, and your water gets aggressive, eating your plaster or grout like a hangry toddler. Too much? You get that nasty white scale on everything.
It’s like when you oversalt the pasta water. Unpleasant, right? The ideal range is usually between 200 and 400 parts per million (ppm). Above 500 ppm? That’s when we grab our tool belts.
