Common organic causes include scale, algae, âpink slime,â white water mold and vinyl liner mold. The Langelier Saturation Index measures the corrosiveness and neutrality, or scaling ability, of water. Water, by nature, âwantsâ to be neutral or balanced.
Joanna J. K. Rowling is 51 years old (birthdate: July 31, 1965). Joanna J. K. Rowling is 51 years old (birthdate: July 31, 1965).
Comments. 1) The boy wizard Harry Potter and author JK Rowling share the same birthday: 31st July. 2) Rowling went from being unemployed and living on state benefits to becoming a multi-millionaire in five years.