I don't know, but you could probaly find out on http://www.Google.com/.
Yes
ALGAE : any of a group of aquatic plants, ranging from one-celled plankton to large seaweeds.
Black algae can be transported via dust and leaves into your pool. Also, cross contamination can occur from bathing suits used in fresh water lakes.
Algis Budrys was born on January 9, 1931.