Monday, September 16, 2013

Help is this black mold in my shower? How do I identify fix

So, I was going about to replace the failing caulk in our bathroom shower that is seldom used. We just moved in here and the house has been vacant for 2 years.
As I removed the previous caulk, I noticed black powder. Is this black mold? Should I be worried? how should I go about...
Help is this black mold in my shower? How do I identify fix

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