Black Spots in Toilet Bowl: How to Remove them?

Do you have black spots in your toilet bowl that just won’t go away? If so, you’re not alone. Many people struggle with this problem.

In this blog post, we will discuss the causes of black spots in the toilet bowl and provide tips on how to remove them.

black spots in toilet bowl

What Causes Black Spots in Toilet Bowl?

There are many potential causes of black spots in toilet bowls. Here are the most common ones-

Manganese Buildup

One common cause is the build-up of minerals from hard water. When water contains high levels of manganese, it can leave black spots behind.

Toilet Cleaners

Another potential cause is the use of harsh toilet cleaners. If you use a cleaner that contains bleach or other strong chemicals, it can react with the minerals in your water and cause black spots to form.

Mold or Mildew

Another possibility is that the black spots are actually mold or mildew. This can happen if the bowl is not cleaned regularly.

Dirt and Debris

Finally, sometimes black spots can be caused by dirt or debris that has become lodged in the bowl.

Whatever the cause, black spots in toilet bowls are unsightly and can be difficult to remove. You may be wondering how to know what caused the stains in your toilet bowl.

Here’s a quick tip– If the stain is under the waterline in the bowl, it’s probably because of the mineral buildup from hard water. If the spot extends above the waterline, then it’s from mold and mildew.

And harsh chemical-caused spots will be in random places, not necessarily be under or above the waterline.

If you’re struggling with this problem, read on for some tips on how to get rid of those pesky black spots once and for all!

How to Remove Black Spots from Toilet Bowl?

There are a few different ways that you can remove black spots from your toilet bowl. Before you start the process, you should first understand the cause of the spots.

As I said earlier if the spot is not extending above the waterline, it’s from Manganese deposits and if spots are above the waterlines, they are from mold or mildew.

stained toilet bowl fix

Finding out the root of the problem is important as it will help you solve the issue effectively and allow you to take preventive measures down the line so that the black stains in your toilet bowl don’t reappear again.

Cleaning Mold Spots from Toilet Bowl

If you have black mold spots in your toilet bowl, don’t worry. They’re easy to remove with a little bit of borax and vinegar. Just follow these steps and you’ll have a clean toilet in no time!

Gather Essentials

Before you start the process, gather these essentials-

  • Spray bottle
  • Borax powder
  • White vinegar (distilled)
  • Toilet brush
  • Dust mask

Flush the Toilet

The first step is to wear a dust mask. After that, flush the toilet. This will help to dampen the sides of the bowl and make it easier for the borax to stick.

Sprinkle Borax on Spots

Once the toilet has been flushed, sprinkle a generous amount of borax onto the black spots. Make sure that each spot is well coated. Perform this when the toilet is still wet so that borax holds onto the toilet bowl surface.

Pour Vinegar into Spray Bottle

Next, pour distilled white vinegar into a spray bottle and spray onto the spots. You’ll want to use enough vinegar to thoroughly soak each spot.

Spray Vinegar onto Spots

Now it’s time to spray the vinegar onto the spots. Be sure to saturate each one completely. The vinegar and borax will need to sit for several hours in order to work properly, so don’t use the toilet during this time.

Scrub Spots with Toilet Brush

After a few hours have passed, wet a toilet brush and scrub the spots to remove them. The borax will help to loosen the spots and make them easier to remove. Be sure to scrub all of the affected areas thoroughly.

Flush Toilet to Finish

Once all of the spots have been removed, flush the toilet to finish cleaning the sides of the bowl. Your toilet should now be clean and free of any black mold spots!

Cleaning Manganese Spots from Toilet Bowls

If you have manganese spots in your toilet bowl, you can remove them by following the steps above. You may need to repeat the process a few times to completely remove the spots.

Gather Essentials

Here are the tools and supplies that you need to do the task-

  • Cream of tartar
  • 3% hydrogen peroxide
  • Old toothbrush
  • Toilet brush

Turn off the Water

The first step is to turn off the water to the toilet. This is important because you are going to use a cream of tartar on spots. The paste needs to be in place for quite a while to be effective. So, you can’t risk pouring water into the toilet bowl while doing the process.

Flush the Toilet

After turning off the water, you will need to flush the toilet. This is to lower the water in the toilet so that you can access the spots more easily.

Bail Out Water from Bowl

If necessary, use a cup to bail out more water from the bowl until the spots are exposed. I recommend removing all the water from the toilet bowl for convenient working.

Mix Cream of Tartar and Hydrogen Peroxide

In a small bowl, mix together the cream of tartar and hydrogen peroxide. Slowly add hydrogen peroxide while you mix them until it forms a paste.

Scoop Paste onto Toothbrush

Scoop some of the paste onto an old toothbrush. You don’t want to use a regular toilet brush for this because the hydrogen peroxide may damage the bristles. So, use a toothbrush to precisely apply to the spots. Plus, you can throw the brush away after the work is done.

Coat Spots with Paste

Use the old toothbrush to coat the spots with paste. Be sure to get a good amount of paste on all the spots.

Let Paste Stand

Let the paste stand on the spots for at least 15 minutes. This is important because you want to give the cream of tartar and hydrogen peroxide time to work on breaking down the spots.

Rinse Paste Off

After the paste break down the spots, rinse it off with water. You can use a cup of water and pour it over the spots while scrubbing gently with an old toothbrush.

Examine Toilet Bowl

After rinsing, examine your toilet bowl. If the spots are gone, turn on the water to your toilet and flush to rinse out any remnants of cleaning agents from the bowl. If spots remain, repeat the same steps until they are removed.

How to Prevent Black Spots from Reappearing in Toilet Bowl

Now that you know how to remove black spots from your toilet bowl, you may be wondering how to prevent them from coming back.

The best way to prevent spots is to clean your toilet regularly. You should also avoid using harsh cleaners on your toilet as they can damage the finish and cause spots to reappear. If you do use a cleaner, be sure to rinse the toilet well afterward.

Finally, always wipe up any spills or drips immediately as they can lead to spots forming over time.

If you have hard water, spots may reappear more quickly. In this case, you may need to clean your toilet more often or install a water softener.

Regular cleaning and prompt removal of spills should help keep your toilet clean and free of black spots!


Black spots in your toilet bowl can be unsightly and difficult to remove. However, with a little effort and the right supplies, you can get rid of them for good!

Be sure to clean your toilet regularly and wipe up any spills immediately to prevent spots from forming in the future. Thanks for reading!

I hope this article was helpful. If you have any questions or comments, please feel free to leave them below! Happy cleaning!

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