Iron in the water. Often called that when the content of iron is too much for one to tolerate.
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.
Refers to pipes that get plugged with hard water that forms 'scale'
Rabies
Hard water refers to water that has very high mineral content, which affects its behavior in pipes and its affect on other chemicals like soap, where it often causes the formation of soap scum. Hard water also has a tendency to form deposits in pipes. Normally you wouldn't WANT to make water become hard, and there are systems for trying to reduce the "hardness" of water in the pipes of your home.
distilled water refers to water nearly free of ionised atoms such as Cl,Mg,and Na
You might be talking about ice but hard water is sourced from limescale rock and the limescale is in the water and that is what you get in your kettle when you dont filter the hard water.
Forms of Calcium is what makes hard water hard
not subject to feca regulations
Stagnation usually refers to the state of water when it is not flowing
Hard water is potable (drinkable).
How can we deal with hard water
salt