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How to Kill Black Mold in a Swimming Pool

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The pool image by yaros from Fotolia.com

Black mold grows very quickly, often leaving stains if it is not removed properly or quickly enough. Black mold is known for having especially strong roots and multiple protective layers, making it one of the trickiest molds to kill in a pool. Black mold or algae looks like dark black or blueish-green spots, and its roots will often grow out into the tiling or walls near the pool. If not completely eradicated, black mold will also grow back again.

Brush any black mold formations thoroughly with a stiff, wire brush.

Turn off your pool pump.

Use a large chlorine tablet and break it into a couple decently-sized chlorine tablets. Rub the chlorine tablet onto the areas of black mold. Do not use chlorine tablets if your pool is lined with vinyl.

  • Black mold grows very quickly, often leaving stains if it is not removed properly or quickly enough.
  • Black mold or algae looks like dark black or blueish-green spots, and its roots will often grow out into the tiling or walls near the pool.

Pour a generous amount of a good all-purpose algaecide onto the areas of black mold. Let this sit overnight, with your pool pump still shut off as well.

Scrub off the black mold areas with your wire brush. Use a wet-vac to suck up the nasty black mold sludge into a safe disposal area. Start your pool pump again.

Remove Black Mold From A Swimming Pool's Wooden Deck

Move any plants, furniture or other items from the deck. Put on a pair of rubber gloves and safety goggles and mix 1 quart of chlorine bleach, 1/3 cup of powdered laundry detergent and 3 quarts of water in a large bucket. Scrub the wooden deck thoroughly with the brush to remove any black mold.

  • Pour a generous amount of a good all-purpose algaecide onto the areas of black mold.

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