Swimming pool with bright blue tiles and no visible stains

DIY Steps to Remove Organic Pool Stains

Organic stains in pools are caused by natural materials like leaves, algae, berries, and dirt. These stains can cling to your pool surfaces, making them look dirty even after cleaning the water. While they might seem stubborn, the good news is you can often remove them yourself with the right approach.

Understanding Organic Pool Stains

Organic stains usually appear as brown, green, or dark patches on pool surfaces. They differ from metal or rust stains, which often have a reddish or blue-green hue. The main culprits for organic stains include:

  • Fallen leaves and twigs

  • Algae growth

  • Berry or flower debris

  • Pollen and natural dirt

Identifying the type of stain is important before treating it. If your stain fades when brushed with a chlorine puck, it is likely organic.

Step 1: Prepare Your Pool

Before starting the stain removal process, ensure your pool is ready:

  1. Balance the water chemistry – Keep pH around 7.2 to allow chlorine to work effectively.

  2. Remove debris – Skim leaves, branches, and other visible dirt.

  3. Vacuum the pool floor – This prevents loose debris from spreading during cleaning.

Step 2: Shock the Pool

Shocking your pool raises chlorine levels to kill algae and bacteria that may be causing or worsening stains.

  • Use a chlorine shock treatment according to your pool size.

  • Run the pump for at least 8–12 hours to circulate the treatment.

  • Retest and adjust water chemistry afterward.

Step 3: Direct Stain Treatment

For stubborn spots, focus your cleaning efforts directly on the stains:

  1. Use a chlorine puck – Hold it against the stain for a few minutes or place it in a weighted sock.

  2. Scrub with a pool brush – Nylon brushes work for vinyl, and stainless steel brushes work for concrete pools.

  3. Apply granular chlorine – Sprinkle it over the affected area for an extra boost.

Step 4: Try a Natural Enzyme Cleaner

If you want to avoid excessive chemical use, enzyme-based cleaners can help break down organic matter:

  • Add the recommended amount to your pool water.

  • Allow the circulation system to run so the enzymes can reach all surfaces.

  • These products are especially helpful for light stains and ongoing maintenance.

Step 5: Prevent Future Organic Stains

Once the stains are gone, regular maintenance will keep them from coming back:

  • Skim and vacuum regularly.

  • Trim nearby plants to reduce debris.

  • Maintain proper chlorine levels.

  • Brush walls and floor weekly to prevent buildup.

When to Call a Professional

If stains remain after multiple treatments, you might be dealing with mineral or metal stains rather than organic ones. In that case, professional water testing and treatment may be necessary.

With these DIY steps, you can restore your pool’s appearance and prevent organic stains from ruining your swimming experience.
Back to blog

Leave a comment