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Prevention is better than cure, but if your pool is severely stained and the usual removal techniques are not working, Acid Washing may be the answer for your Pool stains.

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Acid washing can be used as an effective method to remove stains from swimming pools, but it is important to exercise caution and follow proper procedures to ensure the safety of both the pool and the person performing the task.

Whilst it is not recommended for regular maintenance of a swimming pool, if performed sparingly, there are some great potential benefits of acid washing a swimming pool to remove unsightly stains to the pool interior.


Here are some reasons why acid washing your pool can help when used appropriately:

  1. Stain removal: Acid washing can effectively remove stubborn stains, such as mineral deposits, hard water stains, or certain organic stains that may be resistant to other cleaning methods. It can help restore the appearance of the pool surface by eliminating unsightly discoloration.

  2. Fresh start: Acid washing provides a fresh start for a heavily stained pool. It can be particularly beneficial if you've recently acquired a neglected pool with severe stains or if the pool has undergone significant algae or mould growth. Acid washing can help remove built-up contaminants and give the pool a clean slate.

  3. Surface preparation: Acid washing can be used as a preparatory step before resurfacing or repainting a pool. By removing stains and etching the surface slightly, it can improve the adhesion of new coatings or finishes, ensuring better and longer-lasting results.

  4. Increased longevity: By removing mineral deposits and organic stains, acid washing can potentially extend the lifespan of your pool's surface. Stains and deposits can deteriorate the surface over time, leading to premature wear and damage. Acid washing can help mitigate this issue and contribute to the longevity of the pool's structural integrity.

  1. Assess the stains: Determine the type and severity of the stains in your pool. Acid washing is typically used for removing mineral deposits, hard water stains, or certain organic stains. If you're unsure about the stains or their composition, consult with a professional pool cleaner or service technician.

  2. Prepare the pool: Lower the water level in the pool to expose the stained areas. It is important to drain the water according to local regulations and guidelines. Remove any large debris or leaves from the pool to prevent them from interfering with the acid washing process.

  3. Safety precautions: Acid washing involves the use of muriatic acid or a similar acid-based cleaner, which can be hazardous. Ensure you wear appropriate personal protective equipment, including gloves, goggles, and a respirator mask. Follow all safety instructions provided with the acid product.

  4. Dilute the acid: Prepare a solution of acid and water in a clean plastic bucket or container. The recommended dilution ratio is typically one part acid to three or four parts water. ** Always add acid to water and never the other way around to prevent splashing or reactions.

  5. Apply the acid solution: Gently pour the acid solution onto the stained areas, working in small sections. Use a pool brush or broom to scrub the stained surfaces. Be cautious not to scrub too aggressively, as it can damage the pool surface. Allow the acid solution to sit for a short time (usually a few minutes) to break down the stains.

  6. Rinse thoroughly: After the acid has been allowed to work, thoroughly rinse the treated areas with large amounts of water. Use a hose or pressure washer to ensure complete removal of the acid and any residual stains. Direct the rinse water away from plants, grass, and other sensitive areas to avoid damage.

  7. Monitor the process: Keep an eye on the progress of the acid washing. If the stains persist after the initial treatment, you may need to repeat the process or seek professional assistance.

**    Always take care when Acid Washing -  Acid is a power and potent product.    **

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Talk to our team today to better understand your swimming pool, the sanitation requirements and the overall maintenance and PREVENTION OF PROBLEM POOLS.

5 Effective Ways to remove Stains
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  • Acid Washing: In cases where the stains are severe and resistant to other methods, you may consider hiring a professional pool cleaner. They can perform specialized cleaning techniques, such as acid washing or abrasive cleaning, to remove stubborn stains. Professional cleaners have the expertise and equipment to handle these methods safely and effectively.

  • Brushing and Scrubbing: Regular brushing and scrubbing can help prevent and remove surface stains in your pool. Use a pool brush or scrubber to scrub the affected areas, focusing on the stained spots. This method is especially effective for light organic stains or algae buildup.

  • Stain Remover Chemicals: There are various stain remover chemicals available specifically designed to treat different types of pool stains. These chemicals can be effective for removing stubborn stains caused by metals, minerals, or organic matter. Follow the manufacturer's instructions for proper application and safety precautions.

  • Pool Shocking: Pool shocking refers to adding a high dose of chlorine or a pool shock product to the water. This helps eliminate algae, bacteria, and organic contaminants, which can contribute to staining. Shocking the pool regularly as part of your maintenance routine can prevent stains from forming and keep the water clear.

  • pH Balancing: Properly balancing the pH levels in your pool can prevent staining. If the pH is too low or too high, it can cause mineral deposits or scale to form, leading to stains. Regularly test and adjust the pH levels using appropriate pool chemicals to keep it within the recommended range.



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