On Thu, 26 Nov 2009 23:36:13 -0500, wrote:

-snip-

you need to make up your mind-

I don't care if it's eco friendly or not. It works. I had black algae
stains all over my white shingled roof. They are gone. Not plants
or animals were harmed in the process.

We know that statement is false. The question now, is 'what else was
killed besides the lowly algae.

Jim