On Thursday, May 5, 2016 at 7:16:14 AM UTC-10, Brooklyn1 wrote:
> The most Interesting RFC Post This Month... I installed A Laundry Sink
> (Slop Sink) By My Basement Washer... Any Questions? I'm Sure Someone
> Will Ask About The Black... It's All Water Stains From Testing The
> Job.
> http://i68.tinypic.com/5l0yeg.jpg

Mix up one part bleach with five parts water and spray that mold. Looks like you got a lot of that growing down there.