What Causes Yellow Stains In Bathtub? Explained!

Are you facing stubborn yellow stains in your bathtub, sinks, or toilet? These yellow stains look very awkward but should you throw the whole tub out?

I know the terrible problem of yellow stains in the bathtub. These stains are caused by the deposition of hard minerals in your tub or sink. No one wants to take a bath in such a tub, and it also negatively impacts guests. 

You should check your water; if it contains excessive amounts of calcium and magnesium, hard water is not suitable for you.

You don’t need to throw the whole tub out; instead, remove yellows stains. Firstly we will discuss some of the significant factors that cause yellow stains in the bathtub, and then we will discuss the solution. So keep reading!

What Causes Yellow Stains In Bathtubs?

yellow stains in bathtub

Although there are many solutions to clean yellow stains in the bathtub, you could also face this problem again in the future. 

We have to find the root cause of this problem, and many factors cause yellow stains in the bathtub, so let’s discuss them one by one.

1- Hard Water

The hardness of water is typically caused by dissolved calcium and magnesium. And hardness above about 200 mg/L can result in scale deposition. According to ecological and epidemiological studies, hard water is one of the significant root causes of yellow stains. 

If you live in such an area, it is time to take immediate action to get rid of this problem. (We will discuss the solution in the next section).

How To Know That Your Water Is Hard?

If you don’t know that your water is hard or soft, you can do a small test. If you live in an area, then it is time to take immediate action to get rid of this problem. (We will discuss the solution in the next section). 

  • Fill the bottle about 1/3 from your tab. 
  • Now add a few drops of pure liquid soap to it.
  • Shake it for 15-20 seconds.
  • Check the water’s appearance. If it looks cloudy, it means your water is hard.

2- Rust In Water

If your water turns yellow, it means that it has rust in it. Apart from this, you can also notice some particles floating in the water. 

The primary cause of rust is iron in water, although Itron is beneficial for your health if it’s present in sufficient amounts. But excessive amounts of iron react with oxygen molecules in water and cause rusting.

Such rust water can easily cause yellow stains in your bathtub, sinks, and toilets. Additionally, rust water is pretty acidic, so it’s harmful to your skin and hair. 

3- Tannins In Water

If the taste of your tap water is unpleasant and bitter, it means there are Tannins in it. It’s organic matter that reacts with different minerals in water and turns it yellow. You might think it’s some rust, but it’s another thing.

If you live in a countryside area, you might face this issue. This type of water is not suitable for washing clothes, dishes, etc. Excessive tennis in water can leave yellow stains in the bathtub, sinks, shower, and toilets.

4- Oils Can Also Cause Yellow Stains

This is another reason that can cause yellow stains. And I have faced this problem, I was using hair oil in front of the mirror, and often some drops fell in the sink that caused terrible stains after some time. 

Sometimes you are not using oils, but most products contain oily chemicals that can react with water and cause stains. 

Secondly, never try to place your oily products near sinks or bathtubs because these oils react with water and produce stubborn stains over time.

How To Remove Yellow Stains From Bathtubs?

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There are many ways to clean yellow stains from the bathtub, but don’t try any local detergent or cleanser. Secondly, for stubborn stains, you have to apply some efficient method that removes all these stains

Here are some of the best ways that you can use to remove yellow stains from bathtubs or sinks. 

1- For Yellow Stains, Use Vinegar:

The best solution to remove yellow stains is white vinegar. We recommend you use white vinegar with water to dilute it, as it’s very low PH that can affect the bathtub’s surface.

Put 1/3 vinegar in water and pour it on yellow stains, then scrub gently with a brush. 

You can also use microfiber for scrubbing. The second best way to use vinegar in a spray bottle is to put white vinegar in it, add some water and spray on the affected area, then scrunch it with a brush.

For stubborn stains, you can directly pour concentrated vinegar and rub it with a brush. If stains remain, repeat this procedure 2-3 times for effective results.

Here Is Guide: How TO Clean Vinyl Floor With Vinegar

2- For Red & Black Stains:

Compared to the yellow stains, black stains are stubborn and difficult to remove. But you can use powerful baking soda to make these stains disappear. 

Mix two parts of baking soda with one part hydrogen peroxide and make a paste. Try this paste on black stains, leave it for 10-15 minutes, and then scrub it with microfiber or brush. 

For better results, try this procedure 2-3 times. After vinegar, this is the most powerful way to clean stubborn stains from the bathtub.

3- Use Toothpaste:

White toothpaste also can clean stains. Especially if there is rust in a bathtub, then you can use this method to remove it. Simply apply toothpaste to the affected area and clean it with a brush.

But this method is not working for stubborn stains. We recommend you use this method for your sink.

5- Lemon Juice

After vinegar, lemon is another natural choice that removes stains from bathtubs, sinks, fabrics, and ceramic.

The acid in lemon has a natural whitening action that can effectively remove yellow stains. Mix salt and lemon juice for better results and then apply the mixture on the affected surface and clean it with microfiber.

4- Use Cleansers

The last way to clean yellow stains from the bathtub is to use the best cleansers. Don’t try any local cleanser/detergent on stains as it can’t remove stubborn stains. 

Oh, Yuk Jetted Tub Cleaner is one of the most effective tub cleaners that not only remove the yellow stains but is also effective for a yuk. It immediately cleans your tub or sinks and makes them look fresh.

Tips To Prevent Bathtub From Yellow Stains

how to remove yellow stains from bathtub

Your bathtub needs care and maintenance to avoid dirty yellow stains. Especially if you are facing a complex water problem, then you should take immediate action. Hard water not only ruins your bathtub but also affects your skin, hair, and health. 

1- Use Filters:

You can use an under sink water filter, shower filter, or a whole house water filter to avoid a problem of hard water. These filters reduce calcium and magnesium from water and make it soft and usable.

The best water softeners you can use are AquaBliss High Output shower filterAFWFilters 5600SXT 48,000 Grain Water Softener, and Frizzlife Under sink water filter.

2- Regularly Clean Your Tub:

Regular cleaning of the tub can also prevent it from harsh yellow stains. You should clean your tub 1-2 times a week, depending upon its usage. 

3- Add Water Softener To Water:

Add a water softener to your water, and it will automatically make your water soft by removing calcium from it. As hard water is a significant cause of yellow stains, if you add softener, say goodbye to yellow stains.

Final Words

I hope you understand what the primary cause of yellow stains in the bathtub is. We have deeply gone through some of the significant reasons. You can use above mentioned tips to prevent bathtubs from yellow stains. 


How to get a plastic bathtub white again?

Your tub may turn yellow because of hard water. To remove these stains, you can use ⅓ cup of vinegar in 3 cups of water. Pour it on the affected area and leave it for 15-20 minutes, and lastly, scrub it with a brush. 

What type of water is best for a bathtub?

Soft water is perfect for bathtubs. It doesn’t cause yellow stains in the tub, and your tub lasts for a longer time. Hard water can minimize the lifespan of a bathtub, and it’s a major cause of stubborn yellow stains. 

Related: What Cause Yellow Stains On Vinyl Flooring

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