How To Repair Black Spots On Bottom Of Pool
How to Become Rid of Black Algae Spots in Your Pool
Rob is a pool-service industry professional with over 20 years of experience.
Immaculate puddle
Etienne Girardet, via Unsplash
What Is Black Algae?
Black algae is a thread-like growth that develops on crude surfaces in swimming pools. Information technology appears as dark black spots on the puddle'southward walls and floor and is slippery to the touch.
This type of algae forms in a layered construction, with the outermost layer protecting the lower layers. Blackness algae in pools is similar to that which can be found in between bath shower tiles and on silicone seams near the bathtub. It grows very slowly, only is extremely hard to become rid of in one case it has developed completely. It is too chlorine resistant. This is why you will demand to shock the pool and use a silver-based algaecide to get rid of a black algae plague.
This type of infestation is non as difficult to get rid of every bit well-nigh pool service experts would have you believe. The about difficult part is making sure y'all brush all the afflicted areas thoroughly.
Puddle with black algae spots.
How to Clean Black Algae
Before adding whatsoever chemicals, you will need to:
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- Brush every blackness algae spot with a steel-bristle brush to remove the protective layer. Nylon brushes will not work. (Note: If yous accept a vinyl-lined pool, do not use a wire brush, as this can tear the liner.)
- Daze or super-chlorinate the pool using granular chlorine, as well known every bit calcium hypo-chloride. TriChlor stupor, which can be institute at many big retailers, may also be used.
- Enhance the chlorine to at least 15 ppm (parts per million) for 24 hours.
- Add eight ounces of silver-based algaecide per 10,000 gallons of water immediately subsequently shocking the puddle. Add together the solution through the skimmer.
After 24 hours the spots may not be completely eliminated. It will have a few days for the treatment to work. You lot should go on to brush the affected areas regularly. I recommend a quart of algicide every bit a precaution, and for regular maintenance. Silver-based algaecides piece of work best, and my personal favorite is Silvertrine. It looks black when yous add it to the pool, but don't fret. This is normal.
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This article is authentic and true to the best of the author's knowledge. Content is for informational or amusement purposes only and does non substitute for personal counsel or professional advice in business concern, financial, legal, or technical matters.
Questions & Answers
Question: I have a gunnite pool and 3 spots have adult. They are about 3 to 5 inches in diameter. Two are black and one is a green dark-brown, a little like rust spots only not I don't think. The last black spot seemed to announced overnight, I can send photos if that would help. How should I go rid of them?
Answer: I'g non sure if photos tin can be submitted on here, if and then, by all ways transport. Are the spots on the walls or on the bottom surface or steps? This makes a difference. Does any droppings go far the pool? Here'southward why I ask these questions... If organic droppings such as leaves, acorns, etc.. sit on the pool lesser surface, they can create organic stains. These tin can easily exist removed by turning off the pump and sprinkling a little calcium hypochloride granular shock on top of the stains. They will disappear inside seconds. That said, I'm just not 100% sure what type of stains they are without seeing it.
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Source: https://dengarden.com/swimming-pools/How-to-get-rid-of-black-algae
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