Water therapy has been used for centuries to heal the sick 

"Fish from the ocean will die quickly if placed in a solution of refined salt and water."

Hydro- and hydrothermal therapy are traditional methods of treatment that have been used for the treatment of disease and injury by many cultures, including those of ancient Rome, China, and Japan. Water therapy has been around for centuries. The ancient Greeks took therapeutic baths. Water is an important ingredient in the traditional Chinese and Native American healing systems. 

Sodium chloride is one of the 12 daily essential minerals. In countries which do not alter their salt supply, heart disease and arthritis are so rare that many doctors have never seen a case. Their salt is dried from the ocean by the sun. Many people believe that salt is harmful to the human body. The truth is we cannot live without salt (sodium chloride). From salt the body makes hydrochloric acid which is one of the essential digestive fluids. There is not enough natural salt in our foods, so we must supplement our diet. When salt is withheld, weakness and sickness follow. Try this experiment: Mix a spoonful of salt in a glass of water and let it stand overnight. If the salt collects on the bottom of the glass, it has been processed. NATURAL SALT DISSOLVES! Salt that will not dissolve in water cannot disolve in your body. Any foreign substance that collects in the body organs and tissues will eventually result in malfunctioning of essential body processes: heart disease, arthritis, hardening of the body tissues and arteries, calcium deposits in the joints, etc. Natural organic salt (saline) will not cause calcification in your body. Natural, unprocessed salt can dissolve damaging calcium deposits in the body. 

Science and medicine have tried to define the precise roles of salt in the healthy and diseased human organism. Blood, sweat, and tears all contain salt, and both the skin and the eyes are protected from infectious germs by the anti-bacterial effect of salt. When salt is added to a liquid, particles with opposite charges are formed: a positively charged sodium ion and a negatively charged chloride ion. This is the basis of osmosis which regulates fluid pressure within living cells and protects the body against excessive water loss (as in diarrhoea or on heavy sweating).  Sodium and chloride ions, as well as potassium ions, create a measurable difference in potential across cell membranes. This ensures that the fluid inside living cells remains separate from that outside. Thus, although the human body consists mainly of water, our "inner ocean" does not flow away or evaporate. Sodium ions create a high pressure of liquid in the kidneys and thus regulate their metabolic function. Water is extracted through the renal drainage system. The body thus loses a minimal amount of essential water. Out of 1500 litres of blood which pass daily through the kidneys, only about 1.5 litres of liquid leave the body as urine. 

Minerals are "fuel" for nerves. Streams of positively and negatively charged ions send impulses to nerve fibres. A muscle cell will only contract if an impulse reaches it. Nerve impulses are partly propelled by co-ordinated changes in charged particles. 

"Fish from the ocean will die quickly if placed in a solution of refined salt and water. The sodium chloride, in its form as it comes from the refinery, is actually poisonous to them. Bottom line, is that yes it can be harmful to consume too much refined salt, but you cannot consume too much natural unrefined salt."