Restless legs and similar symptoms are a sign of mineral imbalance inside your body.
Multiple major minerals may be involved, like Iron, Magnesium, Potassium, Sodium, Iodine etc.
Also the amount of water and water quality is important !
Just taking more minerals and more water may work for some people, but the real underlying problem is with major internal organs like with digestion, stomach, intestines, liver, kidneys etc.
Some people have calmed their restless legs with extra magnesium or extra iron or extra potassium ....
Liver Flushing , bowel cleansing and kidney cleansing would be my weapons of choice beside diet !