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Black Mold Infected Downspout Threads in Bathtub - Advice Please!
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nestork
Senior Member
Posts: 2,498
Earthbased"
I'm with Derby Dad on this one. Take a small cheap nylon bristle paint brush and paint undiluted bleach (pronounced "bleahk") onto the black stuff you're seeing.
If bleach doesn't kill it, it wasn't alive to begin with.
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