Magnesium is a mineral found in a wide variety of foods. Inside of our bodies we mostly find magnesium in our bones (60-65%), in our muscles (25%) and in other cell types and body fluids. Magnesium cannot be made in our body like all minerals, which is why we need to take it in through magnesium-rich foods.
The Brinell hardness number (HB) is the load divided by the surface area of the indentation. The diameter of the impression is measured with a microscope with a superimposed scale. The Brinell Hardness Number is computed from the equation: P is the applied load of 3000, 1500, or 500kg.
Home water softener systems that were installed in the 1980's are still in operation, and require little maintenance, other than replenishing the salt. Salt is added to the brine tank when a home water softener regenerates. Higher salt settings can result in a greater softening capacity. Typically, water softeners should be checked once a month. The salt level should be kept at least half-full at all times.