Catalan Aigua dura Cited by user Mcapdevila on 02 Jul 2022 En química, l' aigua calcària o aigua dura -per contraposició a l' aigua tova- és aquella que conté un alt nivell de minerals, en particular sals de magnesi i calci.
English Hard water Cited by user Waynejayes on 14 Aug 2018 Hard water is water that has high mineral content (in contrast with "soft water"). Hard water is formed when water percolates through deposits of limestone and chalk…