stains in a pool

How to Easily Remove Pool Stains

If you’ve noticed unsightly stains in your pool, you’re not alone. Compared to Debris in your pool, stains can be a little bit trickier to remove, especially if they are metal stains. This post will explain the most common metal stain colours and then give you the steps to take to remove these stains. If you need assistance, call Master Pool Care on 07 3857 8530.


Why does my pool have stains?

Pool stains are a common issue and can occur in a variety of colours, each indicating a different cause. Here are the most common colours of metal stains in pools:

  • Brown Stains: These are often rust stains caused by iron impurities from items such as bobby pins or hardware nails. Brown stains can also result from the chlorine oxidation of high water hardness.
  • Grey Stains: Usually, these are a copper reaction to calcium deposits in your pool.
  • Black Stains: These are typically the result of chlorine oxidation of free copper present in the water.

Understanding the root cause of these stains is essential for effective treatment and prevention.


How do I remove pool stains without draining my pool?

Removing pool stains requires a methodical approach to ensure the stains are fully eradicated and do not return. Here’s a step-by-step guide to help you:

  1. Check Chlorine Levels
    • Ensure that chlorine levels are below 1 part per million before starting the treatment. High chlorine levels can interfere with stain removal chemicals.
  2. Balance pH Levels
    • While your filter is still running, check and balance the pH levels of your pool water. Proper pH balance is crucial for the effectiveness of stain removal products.
  3. Turn Off All Equipment
    • Once the pH is balanced, turn off all pool equipment to prepare for the stain treatment.
  4. Add Stain Remover
    • Add 1 kg of stain remover to the pool. Focus on the stained areas by soaking them and lightly brushing to help lift the stains.
  5. Brush Problem Areas
    • Lightly brush the stained areas until the stains begin to lift. Be patient, as some stains may require more brushing.
  6. Monitor and Seek Help if Needed
    • If the stains have not lifted within 24 hours, contact Master Pool Care for further advice. Persistent stains might need professional treatment.
  7. Add Shock Treatment
    • Add 1 bag of Shock’n’clear to the skimmer box while the filter is running. This helps in further breaking down any remaining stain particles.
  8. Run Your Filter
    • Keep your filter running until you perform a water test to ensure the pool is safe and suitable for swimming.
  9. Clean the Filter
    • Use a filter degreaser to clean your pool filter thoroughly. This removes any residual stain particles trapped in the filter.
  10. Check and Clean the Cell
    • Finally, check and clean the pool’s cell using a SAF-T cell solution. Regular cleaning of the cell ensures efficient chlorine production and prevents further staining.


Preventative measures

To keep your pool stain-free, regular maintenance is key. Here are some tips to help prevent future stains:

  • Regular Water Testing: Frequently test your pool water to maintain proper chemical balance.
  • Clean Pool Accessories: Ensure all metal objects, such as bobby pins and hardware nails, are kept out of the pool.
  • Routine Brushing: Brush your pool surfaces regularly to prevent buildup that could lead to stains.
  • Use a Metal Sequestrant: Consider adding a metal sequestrant to your pool to bind metals and prevent them from staining your pool surfaces.

By following these steps and preventative measures, you can enjoy a crystal-clear, stain-free pool all year round. At Master Pool Care, we’re dedicated to helping you maintain a beautiful, healthy pool. If you have persistent stains or need further assistance, don’t hesitate to contact us for professional support.

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