is it fluoride
My penis
Mg2+ and Ca2+
magnesium
because pure gold is soft they put other minerals in it to make it hard
soft
Mineral content. more minerals means hard
No, a mineral is a hard substance
My penis
Mg2+ and Ca2+
Tropical refers to the temperature of the water; aquariums can be tropical and hard, or tropical and soft water. Water hardness is simply a measure of the mineral content of the water.
Hard water content of 2+ and 3+ mineral metal ions is high. Most common hardness is result of Ca2+ and Mg2+ ions in ground- or surface water. Soft water on the other hand, contains lower levels of calcium and magnesium. Rain water is soft.
Very soft mineral
can be many things depending on the region, but the primary mineral is almost always iron.
The presence of calcium and magnesium salts in the form of hydrogencarbonate, chloride and sulphate in water makes water 'hard'. Hard water does not give lather with soap. Whereas, water free from souluble salts of calcium and magnesium is called soft water. It gives lather with soap. And also hard water forms scum(precipitate) with soap, therefore unsutable for laundry but soft water does not form scum.
Diamond is the hardest mineral on earth.
Yes
hard water can be converted to soft water by boiling, filteration etc.