How To Clean Scum Line On Pool Liner

To clean scum line on a pool liner, scrub the affected area with a pool liner cleaner and a soft brush. Avoid using abrasive materials that can damage the liner.

A scum line on a pool liner can be an unsightly and stubborn problem to deal with. Over time, oils, sunscreen, and other contaminants can accumulate on the waterline, leaving a thick layer of scum along the edge of the pool.

This not only affects the appearance of the pool but also poses a health risk if left unaddressed. Therefore, it is crucial to clean the scum line regularly to maintain a clean and inviting swimming pool. In this article, we will provide you with a simple and effective method to tackle this issue, ensuring that your pool liner looks pristine and ready for swimming.

Understanding The Scum Line On Pool Liner

The scum line on a pool liner is a common problem that many pool owners face. It is the dark or discolored line that forms around the waterline of the pool, and it is caused by a buildup of oils, dirt, sunscreen, and other contaminants.

Understanding what the scum line is and why it forms is essential in order to effectively clean and maintain your pool.

What Is A Scum Line?

  • The scum line is the line of residue that forms at the waterline of the pool.
  • It is caused by oils, dirt, sunscreen, body oils, and other contaminants.
  • The scum line can be brown, green, black, or white in color, depending on the type of contaminants present.

Causes Of Scum Line Buildup

  • Body oils and lotions used by swimmers can contribute to the formation of the scum line.
  • Sunscreen and tanning oils can leave a greasy residue along the waterline.
  • Environmental factors such as pollen, dust, and algae can also lead to scum line buildup.
  • Insufficient water circulation and filtration can contribute to the accumulation of contaminants.

Why It’S Important To Remove Scum Line Regularly

  • The scum line not only looks unsightly but can also harbor bacteria and algae growth.
  • Regular cleaning and maintenance of the scum line can help prevent stains and damage to the pool liner.
  • Removing the scum line can help maintain water quality and prevent the buildup of harmful substances.
  • By keeping the scum line at bay, you can ensure a clean and inviting pool for you and your family to enjoy.

Remember, understanding the scum line and its causes is the first step towards effectively cleaning and maintaining your pool. Regularly removing the scum line is crucial for keeping your pool clean, safe, and visually appealing.

Effective Cleaning Methods

The scum line on a pool liner can be unsightly and difficult to clean. Luckily, there are several effective cleaning methods you can use to tackle this problem. In this section, we will cover the key points of choosing the right cleaning products, brushing the scum line, and using natural remedies for removal.

Choosing The Right Cleaning Products

  • Look for cleaning products specifically designed for pool liners to avoid any potential damage.
  • Opt for non-abrasive cleaners that are gentle on the liner’s surface.
  • Consider using enzymatic cleaners, which are effective in breaking down oils and organic matter.

Brushing The Scum Line

  • Start by draining the pool water below the scum line to expose the affected area.
  • Use a soft-bristle brush or a scrub pad to gently scrub the scum line.
  • Scrub in a circular motion, applying moderate pressure to remove the scum buildup.
  • Rinse the area thoroughly with clean water after brushing.

Using Natural Remedies For Removal

  • Vinegar: Mix equal parts white vinegar and water in a spray bottle. Spray the solution on the scum line and let it sit for a few minutes before scrubbing.
  • Baking soda: Create a paste by mixing baking soda with water. Apply the paste to the scum line and let it sit for a while before scrubbing.
  • Lemon juice: Squeeze fresh lemon juice onto the scum line and let it sit for a few minutes. Scrub the area gently to remove the scum buildup.

By following these effective cleaning methods, you can easily remove the scum line from your pool liner and restore its pristine condition. Remember to choose the right cleaning products, brush the scum line regularly, and try natural remedies for a chemical-free approach to cleaning.

Step-By-Step Cleaning Guide

If you own a pool, you know how unsightly and stubborn scum lines can be on the pool liner. These lines are caused by a buildup of organic matter, oils, and minerals on the water’s surface, and can be quite a headache to remove.

Fortunately, with a proper cleaning routine, you can keep your pool looking pristine all season long. In this step-by-step cleaning guide, we will walk you through the process of tackling the scum line on your pool liner.

Preparing The Pool Area:

  • Clear the pool area of any debris or objects that might hinder the cleaning process.
  • Put on protective gloves and safety goggles to shield yourself from any harmful chemicals.
  • Ensure that the pool’s filtration system is turned off to prevent any interference during the cleaning process.

Draining The Pool Slightly:

  • Begin by draining the pool slightly until the water level is just below the scum line.
  • Use a submersible pump or a siphon to slowly remove the excess water. Be careful not to drain the pool too much, as this may damage the liner.

Applying The Cleaning Product:

  • Choose a pool liner cleaning product that is specifically designed to remove scum lines. Look for one that is safe for your type of pool liner.
  • Follow the manufacturer’s instructions and apply the cleaning product to the scum line. It’s important to evenly distribute the product and cover the entire affected area.

Brushing The Scum Line:

  • Use a pool brush with nylon bristles to scrub the scum line gently. Start from the waterline and work your way down towards the pool floor.
  • Apply moderate pressure while brushing to ensure effective removal of the scum line. Be cautious not to exert too much force, as it may damage the liner.

Rinsing And Repeating If Necessary:

  • Once you have thoroughly brushed the scum line, use a hose or bucket to rinse the area and remove any residue from the cleaning product.
  • Inspect the scum line to determine if any traces of buildup remain. If necessary, repeat the cleaning process until the scum line is completely gone.
  • Once you are satisfied with the results, turn on the pool’s filtration system and allow it to circulate the water.

By following these simple steps, you can effectively clean the scum line on your pool liner and maintain a beautiful and inviting pool throughout the swimming season. Remember to regularly clean your pool to prevent the scum line from becoming a recurring problem.

Happy swimming!

Maintenance Practices To Prevent Future Scum Line Buildup

Keeping your pool liner clean is not only essential for maintaining its appearance but also for preventing the buildup of scum lines. These unsightly lines can develop along the waterline of your pool and are often caused by a combination of dirt, oils, and chemicals.

Fortunately, there are several maintenance practices you can incorporate into your routine to prevent future scum line buildup. We’ll explore some of the key strategies you can implement. So let’s dive in!

Regular Pool Maintenance Routine

  • Perform regular skimming to remove any debris floating on the water’s surface.
  • Vacuum the pool on a weekly basis to eliminate dirt and particles that may settle on the bottom.
  • Clean the filters regularly to ensure optimal circulation and prevent the accumulation of contaminants.
  • Test and balance the water chemistry regularly to keep the chemical levels in check.

Using Pool Covers

  • Invest in a high-quality pool cover to keep leaves, debris, and other contaminants out of your pool.
  • Use the pool cover when the pool is not in use, especially during the off-season or extended periods of non-use.
  • A pool cover can also help retain heat, saving you money on energy costs and preventing algae growth.

Monitoring Chemical Levels

  • Regularly test the pool water for ph, chlorine, alkalinity, and other chemical levels.
  • Maintain the recommended chemical levels as per the manufacturer’s instructions.
  • Properly balanced water chemistry will prevent the buildup of scum lines and promote a clean, healthy pool.

Consistent Brushing And Cleaning

  • Regularly brush the pool walls, steps, and corners to dislodge any dirt or algae buildup.
  • Pay close attention to the waterline area, as this is where scum lines tend to develop.
  • Use a pool cleaner or scrub brush to remove any visible scum lines and prevent their recurrence.

By incorporating these maintenance practices into your pool care routine, you can effectively prevent the buildup of scum lines on your pool liner. Remember, a little regular effort goes a long way in maintaining a clean and inviting swimming pool.

So, take the necessary steps to keep your pool in top shape and enjoy endless hours of fun and relaxation all season long.

Common Mistakes To Avoid

When it comes to cleaning the scum line on your pool liner, there are a few common mistakes that you should avoid. These mistakes can not only be ineffective in removing the scum line, but they can also cause damage to your pool liner.

To ensure that your cleaning efforts are successful and safe, keep the following points in mind:

Using abrasive or damaging cleaning agents:

  • Avoid using harsh chemicals or abrasive cleaning agents on your pool liner. These can cause discoloration, fading, or even deterioration of the liner material.
  • Instead, opt for gentle cleaning solutions specifically formulated for pool liners. Look for products that are ph-balanced and non-abrasive to ensure that they effectively remove the scum without causing harm.

Neglecting regular cleaning and maintenance:

  • One common mistake is neglecting regular cleaning and maintenance of your pool liner. Over time, scum, oils, and other debris can build up on the liner, leading to the formation of a stubborn scum line.
  • Make it a habit to regularly clean your pool liner to prevent scum buildup. This includes skimming the water surface, brushing the liner, and vacuuming any debris that has settled at the bottom of the pool.
  • Additionally, maintaining proper water chemistry and filtration will help prevent scum formation, reducing the need for extensive cleaning in the first place.

Forgetting to rinse the cleaning product thoroughly:

  • After applying a cleaning product to your pool liner, it is crucial to rinse it thoroughly. Failing to do so can leave behind residue, which can lead to further scum buildup and affect the water quality.
  • Rinse the liner thoroughly with clean water, ensuring that all traces of the cleaning product are removed. This will help maintain the integrity of the liner and prevent any potential damage or discoloration.

Remember, avoiding these common mistakes will not only help you effectively eliminate the scum line on your pool liner but also ensure the longevity and durability of your liner. Stay mindful of the cleaning agents you use, regularly clean and maintain your pool, and always rinse off any cleaning products to keep your pool liner in optimal condition.

Professional Help And Services

The scum line on your pool liner can be a real eyesore. No one wants to dive into a pool and come face to face with a buildup of grime and residue. While cleaning the scum line on your own is definitely possible, there are times when it may be worthwhile to seek professional help and services.

Here are some key points to consider:

When To Consider Professional Assistance:

  • Extensive scum line buildup: If the scum line on your pool liner is particularly severe or covers a large area, it may be a sign that professional assistance is needed. The experts have the knowledge, experience, and equipment to effectively tackle tough scum line stains.
  • Lack of time or expertise: Cleaning the scum line requires specific knowledge and techniques to avoid damaging the pool liner. If you don’t have the time or aren’t confident in your abilities to clean the scum line properly, it’s best to leave it to the professionals.
  • Convenient and efficient: Hiring a professional pool cleaning service takes the burden off your shoulders. They will have the necessary tools, chemicals, and expertise to efficiently clean the scum line, saving you time and effort.

Choosing A Reputable Pool Cleaning Service:

  • Research and reviews: Before hiring a pool cleaning service, take the time to research and read reviews about the company. Look for reputable and experienced professionals with positive customer feedback.
  • Licensed and insured: Ensure that the pool cleaning service you choose is licensed and fully insured. This provides protection for both the company and yourself in case any accidents or damages occur during the cleaning process.
  • Services offered: Check what services are included in the pool cleaning package. Make sure that the scum line cleaning is specifically mentioned and that the company has the necessary equipment and expertise to handle the task.
  • Cost and contracts: Obtain quotes from different pool cleaning services and compare the costs. Additionally, review any contracts or agreements carefully before signing to avoid any hidden charges or surprises.

Remember, the scum line on your pool liner doesn’t have to be a permanent eyesore. Professional help and services can provide the expertise and convenience needed to tackle tough scum line stains effectively. Take the time to choose a reputable pool cleaning service and enjoy a clean and sparkling pool all season long.


The scum line on a pool liner is a common issue that pool owners face. It’s that stubborn ring of dirt and grime that forms along the waterline of the pool, often caused by oils, lotions, and other contaminants. Cleaning the scum line regularly is essential to keep your pool looking clean and attractive.

In this section, we’ll answer some frequently asked questions about cleaning the scum line on a pool liner.

How Often Should I Clean The Scum Line?

  • Cleaning the scum line should be done on a regular basis to prevent buildup and maintain a clean pool.
  • The frequency of cleaning depends on various factors such as the pool usage, the environment, and the products used in the pool.
  • As a general guideline, it is recommended to clean the scum line at least once a week or as soon as you notice any buildup.

Can I Prevent Scum Line Buildup Completely?

  • While it may be difficult to completely prevent scum line buildup, there are steps you can take to minimize it.
  • Regularly maintaining the pool’s water chemistry and proper filtration can help reduce scum line formation.
  • Enforcing good hygiene practices such as rinsing off before entering the pool and using poolside showers can also help prevent scum line buildup.

Can I Use Household Cleaners To Remove The Scum Line?

  • While household cleaners may seem like a convenient option, it’s important to choose the right products that are safe for your pool liner.
  • Some common household cleaners may contain harsh chemicals that can damage the liner or affect the water chemistry.
  • It’s best to use a pool-specific cleaner or consult with a professional to ensure you’re using the right cleaning products for your pool liner.

Remember, keeping your pool’s scum line clean not only enhances its appearance but also helps maintain good water quality. By following these guidelines and addressing any scum line buildup promptly, you can enjoy a sparkling clean pool all season long.

Frequently Asked Questions On How To Clean Scum Line On Pool Liner

How Do You Remove Scum Line From A Pool Liner?

To remove a scum line from your pool liner, mix equal parts of water and white vinegar. Use a soft cloth to gently scrub the scum line, then rinse thoroughly. Another option is to use a pool liner cleaner specifically designed to remove scum and stains.

Can I Use Bleach To Clean The Scum Line On My Pool Liner?

While bleach can be effective at removing stains, it is not recommended for cleaning a scum line on a pool liner. Bleach can be harsh and may damage the liner material. It is better to use a mild cleaner or a product specifically designed for pool liners.

How Often Should I Clean The Scum Line On My Pool Liner?

It is recommended to clean the scum line on your pool liner at least once a week or as soon as you notice buildup. Regular cleaning will prevent the scum from hardening and make it easier to remove. However, frequency may vary depending on usage and environmental factors.

Can I Use A Pressure Washer To Clean The Scum Line On My Pool Liner?

Using a pressure washer is not recommended for cleaning the scum line on a pool liner. The high pressure can damage the liner material and cause leaks. Stick to gentler cleaning methods, such as using a soft cloth or a pool liner cleaner.

Are There Any Preventive Measures To Avoid Scum Line Buildup On A Pool Liner?

To prevent scum line buildup on your pool liner, make sure to maintain proper water chemistry and sanitizer levels. Regularly skim the pool surface and clean the filters to remove debris. Additionally, using a pool cover when the pool is not in use can help reduce scum formation.


Cleaning the scum line on your pool liner is an essential step to maintain a clean and inviting swimming pool. By following the tips and techniques discussed in this blog post, you can easily tackle this common problem. Remember to regularly scrub the scum line with a mild detergent and a soft brush, making sure to rinse thoroughly afterwards.

Using a pool liner cleaner specifically designed for removing scum and stains is also highly effective. Additionally, it is important to maintain proper water chemistry and balance to prevent the buildup of scum in the first place. By regularly monitoring and adjusting your pool’s ph, alkalinity, and chlorine levels, you can keep the scum line at bay and enjoy a sparkling clean pool all season long.

Don’t wait any longer – take action now and make your pool a place of pure enjoyment and relaxation.

About The Author

Scroll to Top