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Removal of gloeocapsa magma from asphalt and metal roofs

I am trying to find a safe chemical to use in the business of asphalt, metal, and wood roof cleaning, mold removal. I think there must be some chemical that is safe. For instance, bleach will do the job but kills the plants. Any help appreciated.

DID YOU FIND A CHEMICAL THAT WORKS? I WOULD LIKE TO HEAR FROM YOU, THANKS -- TED

You are right, Bleach is a quick way to kill plants, but it also destroys the shingles (think of what it does to a pair of jeans).

The safest way to clean a roof and rid yourself of Gloeocapsa magma is to use a purpose built cleaner. Something Quick, Simple and Effective would be ideal.

Once cleaned, you'll need to annually prevent the return of the algae.

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