what they said ^
magnesium and calcium ions, sometimes you find bicarbonates and sulfates
you find Ca in the water through limestone or chalk or other mineral compounds
water "hardness" is caused by its mineral content. Water with a lot of dissolved minerals is called "hard" where water with little dissolved minerals is called "soft."What is mineral water for?
hmm someone have a problem with the answers?How long do hard boiled eggs last?