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).
J.K. Rowling was a single mom living off welfare when she began writing the first Harry Potter novel. Photo by Dan Hallman/Invision/AP. Rowling is now internationally renowned for her seven-book Harry Potter series and, in U.S. currency, became the first billionaire author in 2004.