When you add stuff to kill algae you all af a sudden have lots of dead algae
bodies floating around.
This why we don't like chemicals. New algae will feed on the old algae.
Somebody here had a real problem with a black algae once. I think it was Carol.
And wasn't it a form of blue-green algae? Anyone remember? Carol are you out
there?

k30a
and the watergardening labradors
http://www.geocities.com/watergarden...ors/index.html