How to Clean Pool Steps That are Yellow Stained – 2 Reasons and 4 Simple Steps for Stain Removal


cleaning pool steps that are yellow stained

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Are you clueless about how you can clean those yellow stains from your swimming pool steps?

If you are searching for the good advice for this problem then you have come to the right place.

In this article, I will guide you thoroughly by providing the main causes and their right solutions for yellow stained pool steps.

Yellow stains in your pool steps are generally caused by mustard algae and iron deposits.

To confirm the actual cause, you can follow the simple process.

Step 1: Scrub the yellow spot with a pool brush.

If those stains are caused by mustard algae, then the stain will disappear quickly.

However, it may return after a few days automatically.

Step 2: If the stains are formed due to iron deposits, then just by scrubbing with pool brush will not be sufficient.

Here is how you remove algae stains by following below mentioned 5 simple steps.

5 Steps to Remove Algae Stains from Yellowish Pool Steps

Step 1: For stains caused by mustard algae, you need to apply certain types of chemicals or stain removers.

Before starting the process, I highly recommend you to wear your safety gloves, goggles, mask, and apron.

Click Here to Get the Best Stain Remover for Pool Steps.

Step 2: Next step is to choose a proper pool brush.

With the help of the brush, you can scrub off the algae from your yellow stained pool steps.

In this way, it gets exposed to chemicals more effectively.

Step 3: The next step is to vacuum clean the yellow steps.

Here, I suggest you to use manual vacuuming or manual pool cleaner for the best cleaning results.

Automatic pool cleaners can miss some yellow spots from the steps.

During this process, keep the filter running. It will clear all the residue.

Click Here to Get the Manual Pool Cleaners for Your Swimming Pool.

Step 4: The next step is to check the pH of your pool water.

You can either use a digital pool test kit or get a sample of water tested.

Once you receive the results, then you can adjust the chemical levels of your pool water.

The level of pH and chlorine should be in the stable range.

Click Here to Get the Best Quality Digital pH Testing Kit.

Step 5: The last step is to shock the pool water.

This process is also called as the breakpoint chlorination.

It is advisable to perform the process after sunset.

It is because sun rays may react with chlorine and hamper its effectiveness.

4 Simple Steps to Remove Iron Deposits from Yellowish Pool Steps

The removal of yellow stains due to iron deposits involves the following cleaning steps.

Step 1: The first step is to lower the chlorine level of your pool water up to 0 ppm.

Thereafter, lower the pool pH up to 6.8 ppm.

Step 2: The next step is to add iron stain remover.

This chemical helps to scrub off the stains easily.

These chemical solutions are easily available and can even be bought from online stores such as amazon.

Click Here to Get Jack’s Magic Iron Stain Remover.

Remember that for a 5000-gallon pool water, the addition of a quarter of iron stain remover is sufficient.

Step 3: Once you add the stain remover to the water, then kindly keep the pool to rest overnight.

The next morning, you will notice that the pH of the pool has been raised due to the above process.

The pH should be maintained between 7.2 to 7.8.

Thereafter, adjust the levels of chemicals in the water.

Step 4: Finally, follow the process of regular pool shock and vacuum out the iron particles from the pool.

2 Main Reason Why Your Pool Steps are Yellow

The yellow stains on the pool steps are caused by two following factors.

Reason 1: Mustard Algae

Reason 2: Mineral Stains

What are Mustard Algae?

It is a kind of green algae commonly found in pool water.

It is slippery in nature.

When it gets settled in the pool steps, climbing the steps becomes a dangerous affair.

Generally, chlorine in pool water fails to control it fully.

It requires extensive chemical cleaning for complete eradication.

Mustard algae are not harmful to humans. But if left untreated, they can attract harmful disease-causing bacteria.

What are Mineral Stains?

Water consists of various minerals. Iron is one of them.

If the iron level in your pool water is high, yellow stains are formed

Iron tends to get oxidized when it comes in contact with water. 

Due to this process rust-like or yellow stains are formed. The stains formed by iron are difficult to remove

They need iron stain remover and powerful scrubbing to remove it.

Such iron stain removers can easily be purchased from Amazon store.

Click Here to Get Best Metal Stain Remover from Amazon.

Also, if the pool water is hard, calcium buildup may occur.

This may, over a period of time, causes yellow stains.

So, the pH level of pool water should always be maintained.

In addition to the above-mentioned reasons, organic materials can also cause yellow stains on pool steps.

By organic stains, we mean leaves, branches, etc.

After a heavy storm or rainfall, the organic materials get accumulated in and around a pool.

If not removed immediately, they may decompose.

These decomposed organic materials leave yellow marks on the pool surfaces and steps.

4 Simple Methods to Get Your Pool Steps White Again

Depending on the types of stains, you have to follow the specific cleaning method.

The main four methods are mentioned as follows.

Method 1: In case of an isolated stain, you can use calcium hypochlorite or cal hypo.

You need to sprinkle it directly on the steps or add a small amount of it into the PVC pipe.

Put the pipe slowly under the water and gently move it over the pool steps.

Method 2: If your steps have been discolored, then by rubbing chlorine tablets directly on them can make them white again.

But do not forget to use gloves while doing this cleaning process.

You may need to rub the steps repeatedly with the chlorine tablets to get the desired results.

For more efficient results, you can also use a scrubber for efficient rubbing of the steps.

Pool cleaning scrubbers are available in the market and on online platforms like amazon.

Click Here to Get Milliard 10 inch Heavy Duty Pool Cleaning Scrubber.

Method 3: For the yellow stains caused by algae or mineral depositions, elaborate cleaning is required.

Such a cleaning process involves several steps.

You first need to use chemicals and then properly scrub those pool steps.

Thereafter, the process of shocking the pool and adjusting the pool chemicals and pH levels follows.

Method 4: Sometimes use of vitamin C tablets or ascorbic acid in stains does the trick.

They are comparatively safer than using harsh chemicals.

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4 Reasons Why Your Pool Steps are Turning Brown or Orange

When your pool steps turn brown or orange, then something is indeed wrong with the pool water.

The following are the common reasons which cause such discoloration of your pool steps.

Reason 1: Addition of Pool Chemicals with Heavy Metals

Pool chemicals sometimes contain heavy metals. These metals start causing discoloration gradually.

Some of these substances are phosphate-based.

So, while choosing pool chemicals, you must take extra caution.

Reason 2: Accumulation of Algae

The presence of algae in pool water is common.

But they multiply very rapidly.

This causes the pool steps to stain.

The best method to avoid this problem is to prevent the algae from growing in the water.

Whenever algae appear in pool water, immediately remove them manually.

In this way, these algae will fail to multiply and staining will not happen with the steps too.

Reason 3: Unbalanced pH Level of Pool Water

When the pH level is low in your pool, obviously the water will be somewhat acidic in nature.

This causes corrosion of metals and causes brownish stains later on.

Also, if the pH is high, then the pool water is ideal for rapid growth of algae.

This may in turn cause stains too.

Therefore, the maintenance of the pH balance of pool water is very important.

I always recommend to carry a digital test kit for pH testing of your pool water.

With this test kit, you can easily keep track of the ph level of your pool water.

If any issue occurs you can seek help from an expert too.

Click Here to Get Best Quality pH Test Kit for Your Swimming Pool.

Reason 4: Excess Amount of Zinc and Manganese in Pool Water

Pool water often gets exposed to corrosive metals like zinc and manganese.

If rust-like stains appear on pool water, the reason is over-exposure to such metals.

Stains caused by such metals are difficult to remove. It requires professional equipment to remove them.

In such a case, you can seek professional help to get rid of these hard to remove metal stains.

How to Remove Yellow Stains from Pool Walls?

As discussed earlier, yellow stains on Pool walls are caused by algae or minerals, or by organic materials.

The pH level and chemical levels of pool water should be always maintained to prevent staining.

For stains caused by algae, walls should be scrubbed off properly with alkaline solutions like pool cleaners.

Use of a proper cleaning brush or scrubber is also necessary.

A mixture of 3 portions of muriatic acid and 1 portion of chlorine bleach makes an effective stain-removing agent.

Also, the removal of organic and metal stains requires extensive scrubbing with an appropriate brush.

They require strong chemical solutions while cleaning.

Products based on ascorbic or phosphonic acid can be effective in removing such stains.

Why There is a Yellow Ring around Pool Waterline?

Yellow rings are also known as scum lines.

They are caused by organic waste deposition in the pool wall.

When we use pool water, substances like oil, dirt, cosmetics, etc. gets deposited in the pool.

Also, organic waste like decomposed leaves, etc. may get stuck with the pool wall.

These organic wastes, gradually, forms the yellow ring around the pool waterline.

The most effective way to remove such a ring is by adding pool enzymes to your pool water.

This product is great in removing scum lines and waterline buildup.

It also helps in keeping optimum water balance and augments chemical treatments.

Click Here to Get Orb-3 Pool Enzymes for Your Pool Water.


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