Black algae is one of the toughest contaminants to remove from swimming pools. Unlike other algae forms, black algae have deep roots that allow them to cling to surfaces like cracks in concrete or tile grout. These algae are not just an aesthetic issue but can also cause sanitation problems by forming a shield-like protective layer, making it resistant to standard pool chemicals. If you’ve noticed dark spots in shaded areas of your pool, it’s time to act fast. Here’s how you can effectively get rid of black algae in your pool.
What Is Black Algae in a Pool?
Black algae are bacteria that appear as dark, stubborn spots on the surfaces of your pool, often growing in areas with low water flow. Unlike green algae, black algae root deeply into rough surfaces like cracks and tile grout, making them more challenging to eliminate. The protective layer they form shields them from regular pool chemicals, making a standard treatment less effective.
Steps to Eliminate Black Algae in Your Pool
1. Scrub the Affected Area
The first step in getting rid of black algae is to physically dislodge it from the surfaces of your pool.
- Use a stiff pool brush: Black algae form a protective layer, so you’ll need a stiff brush to break through that outer coating.
- Focus on shaded areas: Black algae tend to thrive in areas that are not exposed to direct sunlight, so pay special attention to these spots.
- Scrub thoroughly: Make sure to remove as much of the algae as possible. The deeper the scrub, the better chance you’ll have of eliminating the roots.
2. Shock the Pool
Once you've scrubbed the algae, the next step is to hit it with high levels of chlorine to kill it at the source.
- Increase chlorine levels: Add a shock dose of chlorine to your pool. This will raise the chlorine concentration enough to kill the algae and sanitize the water.
- Follow product instructions: Be sure to use the correct amount of chlorine-based on your pool size. Check the product’s guidelines for the proper dosage.
- Maintain chlorine levels: After shocking the pool, continue to monitor and maintain chlorine levels. This will prevent the algae from regrowing.
3. Apply Black Algae Algaecide
While shocking helps, black algae are resistant to standard chlorine treatment alone. You’ll need to apply a specialized black algae algaecide.
- Target problem areas: Apply the algaecide directly to the spots affected by black algae. Be generous with the application in deeply infested areas.
- Follow product instructions: Always adhere to the manufacturer’s directions when using algaecides. Overuse can lead to imbalanced pool water.
- Allow time for effectiveness: Let the algaecide sit and work for the recommended time to ensure it penetrates the algae and kills it at its roots.
4. Run the Pool Filter Continuously
The final step is to keep the pool filter running to circulate the chemicals and ensure they reach all areas of the pool.
- Circulate chemicals: Ensure the pool filter is running continuously to help distribute the chemicals throughout the water.
- Promote even distribution: This step ensures that the algaecide and chlorine reach every corner of the pool, including areas that may be hard to access.
- Monitor water quality: Regularly test the water to ensure chemical levels are balanced and safe for swimming. Maintaining proper chlorine and pH levels will help prevent future outbreaks.
Conclusion
Dealing with black algae in your pool is tough, but it can be eliminated by scrubbing, shocking, and using black algae algaecide. Keeping the filtration system running and maintaining chemical levels is key for prevention. Check out the full blog to learn more about black algae in pool.
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