Effective Methods to Treat and Prevent Pool Stains

Stains are a great annoyance for owners of swimming pools, as they will attest to. Stains can make your swimming pool look dirty, unsightly, and horrid. A dirty swimming pool will often be seen as a reflection of its owner, even if it is not true. You may be the most hygienic person in the world, but if your swimming pool is stained, that is not what your guests will think. There are, however, a few ways you can treat and prevent swimming pool stains from occurring, and that is what we here, on this page, will hope to help you with.

With the help of this page, we will offer you a few effective methods to treat and prevent stains in your swimming pool. You mustn’t fear stains, for every stain has a solution. You can perform these stain-removal jobs yourself – but if you are uncertain, you can of course hire a professional to do it for you. If you are sheepish around chemicals and do not like touching them, as many are, then a professional may be the best option for you.

Here are some effective methods to treat and prevent stains in your swimming pool.

Cause of Stain

It is important to determine the cause of the stains in your swimming pool so that they do not reoccur. There are many different causes and types of pool stains. The most common causes are as follows:

  • Organic compounds and materials, like leaves, oils, worms, algae, which can turn water odd colors, or dirt;
  • Rust breaking through the wall of your pool, floor, or through fittings and air ducts;
  • Minerals and metals in your swimming pool coming out of your swimming pool solution.

One of the best ways to identify a metallic stain [which are the most common] in your swimming pool is by its color. Here is a chart of colors and their causes:

Metal                       Sources                                        Colours

Calcium             Plaster, grout, chlorine shock            White crystals

Cobalt                Fiberglass shelling                            Red, grey, blue

Copper              Copper algaecides or corrosion        Blue, teal, black

Iron                   Corrosion of iron pipes                     Red, brown, grey

Manganese       Well water                                         Pink, black, red


So that you can treat your stains properly, it is important to identify the stains, as well as the cause. It is very common for swimming pool owners to think they have a stain when it is just algae, which is very, very frequent, and quite treatable. Algae, according to the swimming pool specialists of thepoolstainremovers.com.au, cannot be treated by quickly emptying out your pool [which many try to do], for it lives in your ducts, pipes, and filters. This means, once you drain your pool and wash the spots with acid, once you fill it back up, the algae will reoccur. If it is not algae, then it is likely a mineral stain. You can test whether or not it is algae or a mineral stain with testing kits, which can be found in virtually every swimming pool supply store or on every swimming pool supply website throughout the world.


We will now move onto what solutions are best for what stains:

Metal Stains

Metal stains create rusty stains in your pool that appear reddish-brown, or dark. These stains can be a big problem. If you treat them, however, they should not reoccur for a while, at least. You can control the metal in your swimming pool with anti-metal stain treatment, which is purchasable offline and online. Straightforward, right?

Rust Stains

Rust Stains

If it looks like rust, it’s either metal or, well, rust! Rust stains appear after rusty metal objects find their way into your swimming pool. Or the rust is coming from inside-out. If you have a concrete swimming pool, a rebar tie wire may be too close to the surface, or there may be a crack that has allowed water to reach your pool’s rebar steel. In vinyl swimming pools, galvanized walls in wet soil can break down and rust. This can be slowed and prevented with paint and wall foam.


Mineral stains which are quite common are a scale film mixed with dirt and oils. This kind of stain is usually found as waterline stains, with scaly-white deposits over the tiles. Mineral stains can be controlled and prevented with an anti-mineral stain treatment.

Organic Stains

Organic stains are very common, especially if it is autumn and leaves are falling into your pool. Greenish-brown stains are often caused by organic compounds leaching into your pool. Additionally, algae, worms, or animals can leave stains on your surface. You can get rid of these with chlorine granules, which can be applied directly to your pool.

Now, with this page, you know how you can prevent and treat annoying stains in your swimming pool. Stains can be a huge burden for swimming pool owners. But, with this page, that doesn’t have to be the case anymore.