Why Do Swimming Pool Stairs Turn Yellow?

Why Do Swimming Pool Stairs Turn Yellow?

Having a pool is typically a source of fun and relaxation for pool owners. When you start to see deterioration or a yellow tint on your pool stairs, it can be worrying because you want your pool to be in peak condition at all times.


Don’t worry! We’ll go through potential causes of the yellowing of your pool stairs as well as solutions. Soon enough, your pool will be in excellent shape!

Algae mustard

Due to its resistance to chlorine, mustard algae is a common kind of green algae in swimming pools. But don’t be alarmed by this; with the appropriate combination of chemicals and upkeep, you can eliminate mustard algae and protect your pool. True to its name, you can see it as the yellow tint or stain that is covering your pool stairs.


Although this kind of algae is not at first detrimental to people, it can draw more aggressive, dangerous germs. If left untreated, mustard algae can make the water cloudy, reduce visibility, and leave a slick coating on your stairs.

Biological Stains

Organic stains are stains brought on by algae blooms, debris, branches, or leaves. Organic stains, often known as vegetable stains, could be especially obvious after a storm or a very heavy downpour. The organic material in leaf clusters can stain the pool’s steps, walls, and floor if you let them remain there.


This buildup of organic materials and minerals over time might cause a yellow-tinted film to cover your swimming pool stairs. Instead of letting these stains stay for a long time, it is preferable to remove them as soon as possible.

Mineral Colors

Iron in your water supply is another potential reason for a yellow tinge on your pool stairs. Concrete and vinyl-lined surfaces, ladders, and your pool stairs are just a few of the items near your pool that might become stained due to high iron levels.


Iron usually oxidizes as it enters the water supply, resulting in rust- or orange-colored stains that truly pop against the blue of a pool.


If the pH levels in your pool are out of balance, calcium buildup may also happen. Your pool’s stairs will start to seem white or yellowish if the water contains a lot of calcium deposits. Hard water and insufficient maintenance can increase the likelihood of calcium accumulation. The surface area of your pool stairs will gradually become covered by this deposit as it spreads over time, becoming too tough to remove.

Can You Help?

Immediately treat your pool if you notice any discoloration on the steps. Restore your pool’s functionality as soon as possible to save time and money.



Decontamination is essential for removing mustard algae. Make careful to bleach and thoroughly clean any swimming suits, pool toys, pool cleaning gear, and brushes because the minute algae spores can adhere to other objects.


Treatment by a Professional

Professional pool cleaners are able to help you get rid of severe stains and discoloration from a swimming pool if you have extremely obstinate pool blemishes. They are qualified to employ the appropriate substances and methods due to their experience and knowledge.


shock-proofing your pool

One pound of chemicals is added to the pool for every 10,000 gallons of water throughout the shock treatment process. The shock solution should be poured all around the pool and left to filter overnight.


When trying to remove stubborn deposits like mustard algae or mineral stains that are difficult to remove on their own, powerful chemical treatments can be quite beneficial. After cleaning your pool, be sure to vacuum it to remove any dirt.

Regular Care

Of course, you need also to take daily care of your pool. The distinction between algae development and stains is completely dependent on daily maintenance.


  • For the best chemical balance, test your water every two weeks.
  • Once every week, clean the pool’s steps and walls. Corners and challenges to access regions close to the steps should not be disregarded.
  • Clear up your pool of any leaves or other trash that keeps finding its way there.
  • To stop particles from being drawn back into your filtration system, empty the skimmer basket every few days.
  • frequent use of the vacuum.

Invest the Love Your Pool Deserves

Give your pool the extra attention and care it needs with Baltimore Swimming Pool Pros’ opulent features now that it is in excellent shape.


Enhancing your swimming pool with a beautiful fountain or water feature will help the chemicals circulate, keep the pool clean, and provide a relaxing atmosphere. The cherry on top of your beautifully restored swimming paradise is adding unique elements like a fire element or personalized pool lights.