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).
British writer Joanne Kathleen Rowling, born July 31, 1965, is the creator of the wildly successful Harry Potter book series. Rowling attended (1976â1982) Wyedean Comprehensive School in Chepstow, England.