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Black birds is a living organism that grows top top porous swimming pool surfaces (think concrete, gunite, and also plaster), and also it reflects up in the type of black color spots. It has actually a nasty habit that settling into corners, steps, and also other hard-to-reach areas, and also it flourishes in both sun and also shade.

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It’s additionally the many aggressive kind of swimming swimming pool algae, and also it’s the most complicated form of birds to gain rid of. Simply shocking or adding algaecide to her swimming pool will certainly not kill it. There space two factors black birds is therefore challenging: First, it attributes deep roots that keep it firmly embedded in your pool surfaces. Second, it has actually a natural, protective layer that provides it hard for chemistry to obtain through.

But if you check out the an initial signs of black algae on your swimming pool walls, nothing despair: black color algae could be daunting to treat, yet it’s no impossible. With the ideal pool care routine, you can kick those black color spots come the curb and keep lock from comes back.

How to Treat black Algae

Black birds is difficult -- and also if you want to eliminate it, it’ll take more than a rapid scrubdown. Here’s what you’ll have to do to remove it for good:

Scrub her pool. Use a high high quality nylon brush and also give the black algae a good scrubbing. Remember, you’ll require something tough and sturdy if you want to get past that built-in protective layer. And also don’t it is in fooled by appearances. Even if the black color spots disappear, there might be “roots” beneath the surface, i beg your pardon is why scrubbing alone i will not ~ take treatment of the problem.

Use chlorine tablets. Rest a tablet computer in half and rub it directly onto the surfaces influenced by black color algae. This will help kill the roots and also prevent it type growing back.


security first!

Remember come wear gloves and also protective eye gear prior to you manage chlorine or various other swimming swimming pool chemicals. Back they’re an excellent at removing black algae, some pool cleaners and chemicals can be a tiny harsh on your skin and also eyes.


Clean your filter. Black algae flourishes as soon as swimming swimming pool water is in less-than-pristine condition. Keeping your swimming pool filter clean and also in tip-top shape have to be component of your regular pool maintain routine.


past the pool: Scrub under accessories, toys, and also more.

Black algae spores can acquire into your swimming pool by hitchhiking on other items. To prevent re-introducing black color algae to her pool, wash swimming pool toys and accessories through bleach, and also run her family’s swimsuits with the washing machine.


Shock your pool. Usage granular chlorine to shock your pool water and also kill turn off bacteria. Use 3 times the amount you’d typically use (about three pounds every 10,000 gallons that water). Shock your pool in the evening and make certain to permit your swimming pool filter operation for at least 24 hours after you include the shock treatment. Wait a couple of days and also do a follow-up shock therapy (this time, though, you can reduced it down to one lb per 10,000 gallons).

Repeat together needed. Don’t be discouraged if it takes more than one therapy to remove every one of the black color algae. Keep scrubbing and also shock your swimming pool as essential until the trouble goes away.

How to keep Black algae From comes Back

Want come make certain black algae doesn’t uncover its means back into your pool? The best method to protect against a return is to save up a consistent pool maintenance routine.

This contains testing your water consistently to make sure your pool chemistry is balanced. Use test strips to inspect alkalinity, pH, and also chlorine levels, and also make adjustments as needed. You must brush and vaccuum her pool and also run your pump frequently to remove dirt and debris. Proceed to shock her pool once a week, and also don’t forget to clean any pool accessories or toys, too!

Black birds Q & A


Is black color algae harmful?

Black algae itself won’t hurt you, and also you can’t gain sick from simply swimming in a swimming pool that has actually algae in it. However black algae development can encourage the development of bacteria, which have the right to be unhealthy. This is why it’s important to treat black algae as quickly as you watch it -- and to take actions to keep it from coming back.


How do I get rid of black algae?

To eliminate black algae, you’ll should use a mix of scrubbing and also chemical treatments. A nylon brush can break down the protective class of the black algae, and also chlorine tablets and pool shock chemicals have the right to ensure the your pool water is well balanced (to avoid black birds from comes back, you’ll desire a pH between 7.4 and also 7.6).

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What’s the difference between green algae and also black algae?

The key difference between black algae and green algae is that black color algae is tougher and also more daunting to remove. Unlike green algae (and yellow/mustard, pink, and red algae), it has deep roots and a protective layer that renders it especially resistant to chemical treatments.