Flagstone cleaning/sealing

We have flagstone (type unknown) which is light tan in color and has gotten discolored and also has a lot of white streaks which won't brush off. Bleach seems to get rid of it on the tiny spot I tried it. We have foilage on the edges which we don't want to be killed.

What might I try?

Thank you.

A true novice in southern California

Don Lauda

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bio wash
by: David

Dear Don,

There is a solution called Bio Wash from Prosoco that might be the right solution for you; however, you should call them first.

They might have a better chemical that will get your white spots off.

Their number is 1-800-255-4255.

Great luck!

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