On Fri, 27 Nov 2009 12:45:00 -0500, Tony Sivori
wrote:

tnom wrote:
wrote:

http://www.sprayandforget.com/

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.

Do you have a bottle of Spray and Forget handy? If so, would you please
post the listed active ingredients from the label?

Benzylkonium Chloride

From Wiki: http://en.wikipedia.org/wiki/Benzalkonium_chloride

It is used in pharmaceuticals such as leave-on skin antiseptics,
hygienic towelettes, and wet wipes, Lysol and ethanol-free solutions
are often used in preparations used for skin disinfection prior to use
of syringes.