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).
How to Contact JK Rowling. JK Rowling is the author of the Harry Potter series of books. She appreciates fan mail, but since she receives so much of it, she has asked that it all be sent via her publishers.Ad.ips. 1  JK Rowling does not provide a public email address for contact. 2  As with any popular author or celebrity, she cannot answer every item of mail received. 3  For announcements on her upcoming adult book, see http://www.jkrowling.com/ .