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How to Remove Stains from Your Pool

How to Remove Stains from Your Pool

16,Oct 2019

Stains on your pool can be embarrassing and can make enjoying your pool with friends and family difficult. Some pool stains are hard to remove and may require more than just brushing to remove them.

In some cases, you may need to use powerful chemicals and other pool cleaning methods to treat your pool stains and prevent future stains from forming.

The Different Types of Pool Stains

Before you start to treat your pool stains, it is essential to understand what is causing these stains to occur in the first place. This will help you find the most effective treatment for removing the stains. Different types of swimming pool stains include:

Organic Materials

Leaves, algae, dirt, oil, and worms can get into the pool water and break down. This causes stains to occur. A greenish-brown stain usually indicates that the stain was caused by organic material sitting at the bottom of your pool. Other organic materials such as berries can leave red or blue stains in your pool as well.


Rust stains commonly come through areas of the pool such as the wall, floor, or around fittings. You will usually find these stains in an isolated spot due to a metal object falling into the pool and rusting or from fittings or other metals that make up various pool components.


Metals can come out of a solution and find their way into your pool water, causing dark-colored, reddish-brown, or rust-colored stains. Common metal stains include:

Iron- rusty red to brown or green-brown

Copper- green/blue

Manganese- brownish-black or purple


Mineral stains are made up of scale film that is composed of oils and dirt that have been deposited on the surface of your pool. If your pool has mineral stains, it will appear as dull discoloration. A mineral stain will commonly as a waterline stain which will appear as a scaly, white deposit at the mid-tile water level and can also deposit dirty, filmy stains over other pool surfaces.

How to Remove Pool Stains

When removing pool stains, it is crucial to keep in mind that vinyl and concrete pool stains must be handled differently and treated with different products for maximum effectiveness. The best methods for different types of stains include:

Pool Stains Caused by Metal 

The first step to take for maintaining a stain-free pool is to use stain and scale chemicals that will help to lock up the metals in your pool, such as Metal-Free. Once this treatment has been completed, you should use a stain remover that is ascorbic acid-based and made from Vitamin-C. You can perform a spot test on your stain prior to treatment to ensure it will work for your stain.

For harder to remove stains, you can use stain remover with powerful active ingredients such as sulfamic acid and sodium sulfate that work effectively to remove stains, rust, and grime from your pool.

Organic Pool Stains

Organic stains can be removed from the concrete pool by applying chlorine granules directly to the stain. You can use these granules for vinyl pool stains, but it is recommended that the granules be dissolved before application. In many cases, you can shock your pool and brush it to remove organic stains.

If you have a waterline stain from floating organic material, we recommend you use an enzyme-based cleaner that will help break down the oil and organic compounds.

How to Prevent Pool Stains

There are a variety of ways to prevent staining. One of the best ways to avoid organic stains is to keep the pool clean and free from debris like leaves. For metallic stains, be sure to keep your water balanced through regular monitoring with water chemical testing. Another way to prevent mineral and metals at bay is to use a scale and stain chemical.

Contact Swimming Pool Discounters today to learn more about pool stain removers!