How to Remove Stains from Your Pool

Posted by Blue Haven Pools on 10/07/2019

stains in the bottom of a swimming pool

Pool stains are a common problem for any pool owner, regardless of the type of pool or location. Stains inside your pool are not only unsightly, they can also pose a threat to your health if left unattended, and may become incredibly difficult to remove over time.

Fortunately, the majority of pool stains are fairly easy to get rid of. Still, it’s best to know what type of stain you’re dealing with so you can use the proper approach for best results.

Are stains currently plaguing your pool, or likely to in the future? Don’t worry! Read on to find out how to identify certain pool stains, where they come from, how to remove them — and how to prevent them from happening in the first place.

Metal Stains

Metal components inside pools can eventually create stubborn stains that have a reddish-brown or dark color, especially when you have metal parts on the pool’s floor, walls, or fittings. Some pools may also get metallic stains from components inside certain solutions that have found their way inside, or from well water, iron or copper pipes, or copper pool heat exchangers.

In some cases, a metal object may have been left in a pool for an extended period, causing rust stains around where it’s been sitting.

How to Remove:

For the most part, metal and rust stains are typically isolated, making stain removal a fairly simple task. These stains can generally be removed by using the appropriate metal stain cleaning solution. In some cases, granular vitamin-C can do the trick as well. In some cases, you may need to bring a sample of your pool water in to be tested so you can determine the exact cleaner you need.

Mineral Stains

Mineral stains often involve a scale film mixed with dirt and oils, which will usually result in a dull discoloration that may not be very noticeable at first. These stains tend to be found along the waterline in the form of scaly white deposits on the tile, but this scale can also deposit a filmy stain onto other parts of the pool as well.

How to Remove:

Mineral stains can be removed by adding mineral cleaning solutions to the water. If the stains are around the waterline, you may need to use a brush to loosen it before and after adding the solution.

stains in the bottom of a swimming pool

Waterline Stains

Waterline stains are common when the water level in your pool recedes even the slightest amount. This is even more prevalent for pools that recede during winterization. These stains often occur when there’s a certain amount of oils and dirt on the surface of the water, even if it may not be very noticeable. As the water recedes, a prevalent scum line will remain where the water once was.

How to Remove:

Enzyme cleaners are often the best way to loosen and remove waterline stains. Simply add the solution to the waterline directly, or into the pool, and then use a scrubber to wash the waterline stains off.

Organic Stains

Organic stains are the most widespread of all pool stains and can come from a number of different items entering your pool. These stains are often greenish or brown in color and result from things like leaves, acorns, grass, and dirt making their way into your pool.

Depending on where you live, or the features on your property, you may also have organic stains from insects, animals, algae, and even berries. Regardless of the source, organic stains remain the most common type of pool stain, and one that you’ll constantly have to fight to keep your pool looking clear and inviting.

How to Remove:

Organic stains come in many different forms, but the best cleaning approach is usually just to use granular chlorine shock. You can sprinkle the granules over the stain directly, or simply add it to the water. Either way, a good scrubbing will also help speed up the process, but you should first let the chlorine sit in the pool to help loosen the stains.

(Do you have algae stains in your pool? Click here for our full guide on algae removal.)

floating pool cleaner that helps prevent pool stains

Pool Stain Prevention

As always, the best approach for treating pool stains is to prevent them from happening in the first place! Not only will a proactive approach to stain prevention save you from the need to devote extra time to cleaning, it also ensures your pool is always looking its best on a daily basis.

  • To prevent organic stains, simply be diligent in keeping your pool clean. This can be done in a number of ways, including trimming back trees and vegetation so they don’t drop things into the pool, routinely covering your pool when not in use, and employing the use of an automatic pool cleaner.
  • To prevent metallic, mineral, and rust stains from recurring, keep your water properly balanced by using a good water chemical test kit. You may also want to use a stain and scale removal chemical from time to time, especially if you’ve had frequent problems in the past.

If you ever find yourself in need of pool cleaning supplies, or require any work on your pool, please send us a message, give us a call at 405-844-7500, or drop by and see us at our Blue Haven location in Edmond! Our experienced team can provide you with the expertise and products needed to ensure your pool is always clear and sparkling clean.