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Black Mold On Concrete

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Exactly....try to give the environment a little break...more chemiclas into the drains to empty into the sea...specially when a hard scrub with hot water will do the same job.......ahhh bugger it, not like the klongs are a pristine environment to protect, go for it and double up on the bleach.

I am thinking a shot of haiter might help the khlongs

I quickly glanced through the comments. I saw that someone mentioned vinegar...a great choice.

Many current commercial products for removing concrete stains are now based on ascorbic acid (fruit juice).

Especially with a few chips and salt :o

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