Divide the ppm hardness value by 17.1, the conversion factor for ppm to gpg. The result is the water hardness expressed in grains per gallon. For example, say you have a water hardness value of 180 ppm. Work out 180 ÷ 17.1 = 10.526 Round the result to one decimal place, the same de...
to boron. Silicon is the eighth most common element in the universe in terms of mass, but rarely appears in the crust as a pure element. It is widely distributed in dust, sand grains, planetary-like and planetary in various forms of silica (silicates) or silicates. More than 90% of ...