It’s blue that has different spellings, including calcium and magnesium, more than usual, water is harder than this spelling.The water in which the land is limestone is much harder because it has solved much more calcium salts in itself, but in sandy areas like calcium spelling and magnesium is less hard to water in the rainy season and less rain. Hard water is not suitable for washing fibers, threads, fabrics, rugs because in addition to damaging these materials, it prevents the detergent from performing well. If chemical equipment is not available for a difficult water test, it can normally reduce different stagnations, including to some extent the amount and difficulty of water: 1- Coffee and tea, if brewed with hard water, loses its taste. (3) The salts such as the peas of the beans, the dimensions, if cooked in hard water, are not soft and smooth; the greens in hard water are not well cooked; 5– Hard water, if boiled in the dishes, will be in the separate and tube of that solid cortex. P: The total difficulty, which is a total of two temporary and permanent types. To relieve the total difficulty, or to soften the difficulty of the water, they add to that aluminum or salt sabria so that it can be deposited through its nuance.