Baking Soda for Pool Algae: An Effective and Affordable Solution for Pool Algae

By Algal Web

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Pools are a great way to beat the heat and spend time with friends and family, but they also require regular maintenance to ensure that they remain clean and safe for swimming.

One of the most common issues that pool owners face is algae growth, which can quickly turn a sparkling blue pool into a murky green mess.

Fortunately, there is a simple and affordable solution that can help combat this problem i.e. baking soda.

What is Baking Soda?

Baking soda, also known as sodium bicarbonate, is a naturally occurring compound that has been used for centuries for a variety of purposes.

It is a white crystalline powder that is slightly alkaline and can be found in many households as a common baking ingredient.

However, baking soda has many other uses beyond cooking, including as a cleaning agent, deodorizer, and even as a pool maintenance solution.

Understanding Different Types of Algae

To effectively combat pool algae, it’s important to understand the different types of algae that can grow in your pool. There are three main types of algae: green, yellow/mustard, and black.

Each type of algae requires a different treatment approach, and it’s important to correctly identify the type of algae before starting treatment.

Green algae are the most common type of algae and appear as a greenish, slimy film on pool surfaces. Yellow/mustard algae are less common but more stubborn to treat, often appearing as yellow or brown spots on pool walls and floors.

Black algae are the most difficult type of algae to eliminate, often appearing as black spots or streaks on pool surfaces.

How Baking Soda Works to Combat Pool Algae

When added to pool water, baking soda works to raise the pH level and increase the alkalinity of the water. This is important because algae growth thrives in low pH and low alkalinity environments.

By increasing the pH and alkalinity levels, baking soda helps to create a more hostile environment for algae to grow.

In addition to using baking soda to combat existing algae growth, it can also be used as a preventative measure to help keep your pool algae-free.

By regularly adding small amounts of baking soda to your pool, you can maintain consistent pH and alkalinity levels that discourage algae growth.

A good rule of thumb is to add 1 pound of baking soda per 10,000 gallons of water per week to help maintain proper chemical levels.

Baking soda also helps to clarify pool water by binding with particles and contaminants that can cause cloudy water. This helps to improve overall water quality and makes it easier to maintain proper chemical levels.

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Benefits of Using Baking Soda for Pool Algae

Using baking soda for pool algae has many advantages over other pool cleaning products.

Firstly, baking soda is incredibly affordable and readily available at most grocery stores, making it a convenient solution for pool owners.

Secondly, baking soda is non-toxic and safe to use, which is important for maintaining a healthy swimming environment for both humans and pets.

Finally, baking soda is a gentle and effective solution that doesn’t damage pool surfaces or equipment. This is in contrast to other pool cleaning products that can be harsh and corrosive, leading to damage and costly repairs.

How to Use Baking Soda for Pool Algae

Using baking soda for pool algae is a simple process that can be done in just a few steps. Here’s how:

Step 1: Test the Water

Before adding baking soda to your pool, it’s important to test the water to determine the current pH and alkalinity levels. You can do this using a pool testing kit, which is available at most pool supply stores.

Step 2: Add Baking Soda

Once you have tested the water, you can add baking soda to the pool. The amount of baking soda needed will depend on the size of your pool and the current pH and alkalinity levels. A good rule of thumb is to add 1.5 pounds of baking soda per 10,000 gallons of water to raise the alkalinity by 10 ppm.

Step 3: Mix Thoroughly

After adding baking soda, use a pool brush or other mixing tool to distribute it evenly throughout the water. It’s important to ensure that the baking soda is well mixed to avoid any localized high alkalinity spots.

Step 4: Retest the Water

After a few hours, test the water again to ensure that the pH and alkalinity levels have been raised to the desired levels. If necessary, you can repeat the process until the desired levels are achieved.

Common Mistakes to Avoid When Using Baking Soda

While baking soda is a safe and effective solution for pool algae, there are some common mistakes that pool owners make when using it.

One mistake is adding too much baking soda at once, which can result in localized high alkalinity spots that can damage pool surfaces. It’s important to add baking soda slowly and mix it thoroughly to ensure even distribution.

Another mistake is using baking soda as a substitute for other pool chemicals, such as chlorine or algaecides.

Baking soda is not a substitute for these chemicals and should be used in conjunction with them to maintain proper chemical levels and prevent algae growth.

Tips and Tricks for Maintaining a Clean and Healthy Pool

In addition to using baking soda to combat pool algae, there are other steps you can take to keep your pool clean and healthy.

Here are some tips and tricks to consider:

  • Regular Cleaning: Regularly clean your pool to remove debris, dirt, and other contaminants that can contribute to algae growth.
  • Proper Filtration: Ensure that your pool’s filtration system is working properly and is adequately sized for your pool. A good rule of thumb is to run your pool’s filter for 8-12 hours per day during the swimming season.
  • Balanced Chemical Levels: Maintaining balanced chemical levels is crucial for keeping your pool clean and healthy. Test your water regularly and adjust chemical levels as necessary to ensure proper pH, alkalinity, and chlorine levels.
  • Shock Treatment: If you notice a sudden increase in algae growth, it may be necessary to perform a shock treatment to kill off the algae. This involves adding a large dose of chlorine to the pool to kill off the algae and restore proper chemical levels.
  • Cover Your Pool: Covering your pool when it’s not in use can help prevent debris and contaminants from entering the water, which can contribute to algae growth.

Alternatives to Baking Soda for Pool Algae

While baking soda is a safe and effective solution for pool algae, there are other alternatives that can also be effective.

One alternative is using borax, which is a naturally occurring mineral that can help raise pH and alkalinity levels in pool water.

Another alternative is using hydrogen peroxide, which can be effective at killing off algae without using chlorine or other harsh chemicals.


Pool algae can be a frustrating and unsightly problem for pool owners, but it doesn’t have to be. By using baking soda to increase pH and alkalinity levels in your pool, you can create a less hospitable environment for algae to grow.

Baking soda is a safe, affordable, and effective solution that can help you maintain a clean and healthy pool all season long.

By combining baking soda with regular cleaning, proper filtration, and balanced chemical levels, you can enjoy crystal-clear water and a pristine pool all summer long.

Additional Posts

  1. Understanding and Dealing with White Algae in Hot Tub
  2. The Relationship Between Phosphates and Algae: Exploring the Science and Implications
  3. Muriatic Acid for Pools Algae
  4. Best Pool Shock for Algae
  5. How to Remove Algae Stains from Pool Walls

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