How To Clean Black Ring Under Toilet Rim Forever | 6 Hacks

A black ring under the toilet rim or bowl not only looks disgusting but also makes your toilet unhygienic. Two to three days after removing the black stuff, it may come back to how much you’re trying. Right? Then how to clean black ring under toilet rim?

Is there present any permanent solution? Then I can say Yes. There is which I used to remove black rings and won’t come back.

Before jumping to the answer, I would like to urge you to know, “what are the main reasons for the black sickening stubborn ring?”

You probably hear the black rings generally form due to hard water, but it is far from that. Check here for more details on what are the causes of toilet rings by colors.

Today, you get the ultimate solution -how to clean a black ring from the toilet. Know about the causes of the black ring formation. Also, some hacks hack for cleaning under toilet rim in the toilet.

Copy these simple steps, and you’ll be surprised by the result. I guarantee you are coming here again and tell me. This is it.

What Causes a Black Ring in The Toilet Bowl and Under the Rim?

I have Kohler Elliston Toilet and facing the same issue a year back. You can believe it or not; hard water minerals aren’t the only culprits behind the black ring in the toilet—also, the molds. 

These toilet rings are not just bad for health. All these sediments create an unhealthy environment and a rotten odor. So, I use a natural odor eliminator for the toilet.

Q1. How does Hard Water Make a Black Ring?

According to the U.S. Geological Survey concluded that 85% of the population in the United States has hard water issues. (source) 

Hard water doesn’t look different from Normal water except for the concentration of minerals. The hard water carries more Calcium, Magnesium, Iron, Lime salt, other materials than Normal water. 

Here, when you see the grey, brown, and black headstrong ring or residue, the culprit is Calcium and magnesium salt. Magnesium and Calcium are the most causative agent, though Calcium is more likely sediment. ( Lime salt) As a result, a black ring is under the rim, bowl, and water line.

The water passes through tiny holes before entering the toilet bowl through the waterline, which helps to increase the water force. Mineral salts gradually accumulate in this hole over time, which later manifests as a black ring or black spots on the bowl.

Another major cause of toilet clogging is this prolonged gathering. Have you ever suffer from clogging issues? Then, don’t forget to check the best way to unclog the toilet when nothing works.

Mold and Mildew are the Second most reason to create black Spots in the toilet bowl and under the Toilet Rim.

Q2. How does Mold & Mildew Make a Black Ring?

Dangerous black molds are more seen in the Pacific regional house, Or high moisture contains climate, damp or humid climate.

Molds and Mildew both are fungi. Bathrooms, specifically shower drains, toilet bowls, Rims, are the best place for their growth.

Not only is humid reason to grow, but Minerals residue is also the most desirable food for molds and Mildew. 24 to 48 hours is sufficient time for rapid breeding.

This type of black stuff is exceptionally troublesome to get rid of since it keeps reappearing after a few days. Moreover, they increase in size day by day. 

Toilet black molds and Mildews are notably dangerous because they can cause Respiratory Infections, Renal Infections, and Urinary Tract Infections, among other things.

Prevention is better than cure. Therefore take 7 simple steps and keep your toilet from getting any rings.

Knowing the reasons and effects, you must be shocked. Then it’s time to clean those evil rings without damage your toilet.

How To Clean Black Ring Under Toilet Rim & Bowl

Black rings inside the toilet not only seem eyesore. Yet, they often also withstand regular toilet cleaning methods such as toilet cleaner, a toilet scrub, etc.

By using the proper cleansing method can defeat the Black ring effectively and permanently as well.

Hacks 1. Vinegar+ Baking Soda For remove black ring under the toilet rim

Baking soda and vinegar are the most common and old grandma’s methods for eliminating black stuff. Both ingredients are readily available and present in every household.

I must say, this method is going to be magic for you if the ring is light and does not spread on a large surface. Vinegar has acidic nature. Hence it can kill molds and fungi undoubtedly.


1. To avoid direct contact with baking soda and vinegar wear high-quality gloves. I recommend, am using this and do so much cleaning purpose.

2. Pour a cup of vinegar into the toilet bowl.

3. Spread Vinegar all over with a toilet brush. Let it be for 40 to 50 mins.

4. After that, Spread baking soda powder well on it and spray some more vinegar on the powder.

5. Leave 20 minutes like this, brush all over the bowl, and flush. Pour a bucket of water into the toilet bowl. You will see that the black ring is gone.

6. Every few weeks, apply 1 cup of Vinegar to the toilet tank to protect future mold growth.

Note Baking soda & Vinegar work well on hard water stains but not old stains. During this process, keep your child and pet away from the toilet. Baking soda and vinegar react to make foams.

Hacks 2. Pour Bleach into the toilet tank and get rid of Molds.

Bleach has strong bleaching and disinfecting properties that can kill parasites, germs, etc. Bleach doesn’t much work on hard water blemishes.

To complete the process, I would recommend you wear gloves. Oxidized bleaches are also a less hazardous alternative to chlorine bleach.


  1. Pour a handful of bleach powder or a cup of liquid bleach into the toilet tank and toilet overflow tube.
  2. Spray bleach powder or liquid on the toilet bowl and spread it well on the brush.
  3. Rest for 15 mins. Make sure to open all windows of the bathroom.
  4. Brush it well on the rings, put in some muscle, then flush it. All mold rings will go like magic.

Note- Open the window and ventilate air well, wear gloves, keep out from children, pregnant ladies, pets. Don’t use other chemicals with bleach.

These are DIY home remedies to eliminate black stuff from the toilet. Now the upcoming solutions are chemical products, eco friendly, and safe for health.

Suppose your toilet is ring-free from the above methods, then don’t go for a commercial product. However, fails, then chose any following product which is convenient for you.

These products intend to remove hard stains.

Hacks3. Clean Black ring under toilet rim with Pumice Stone

While you’re not an expert in this field, so I suggest you use Pumie (Link with Amazon). Pumie is softer and less coarse than a regular Pumice stone.

Pumie or Pumice Stone is really good at removing any black ring caused by hard water.

Read carefully before using any Pumice stone. Pumice stone mainly makes from volcanic rocks. As it is a stone and your toilet is made of either porcelain or vitreous china, so here extra pressure of pumice stone may remain stains or scratch. To avoid such a situation, use Pumie and scrub circular motion with minimum pressure.


  1. Wet Pumice stone very well, or you can keep it wet in advance.
  2. Spread water all over the ring areas only and scrub over it with minimum pressure. 
  3. Make sure during this process, both the stone and toilet ring areas are soggy.
  4. After the process- scrub with the toilet brush and then complete with a flush.

Hacks4. Get rid of Black ring in the toilet bowl by Using Eco-Friendly Hard Water Stain Remover

In case; you don’t want any chemical products. Then Eco-friendly hard water stain remover is the best alternative way to eliminate black stuff.

Here is the product description.

Eco-Friendly Hard Water Stain Remover

How To Clean Black Ring Under Toilet Rim Forever | 6 Hacks


  • Eco friendly
  • Use for – Shower glass
  • Can remove old hard water minerals
  • Last Up to 3 months
  • Porcelain friendly
  • Not effect on health
  • 4.3 Stars, more than 14000+ happy people using
  • Amazon’s choice
  • No weird smell, light lemon fragrance


  1. It doesn’t require any water to be used. The stain remover can be applied directly from the bottle to the stain-ridden surface.

2. Clean with dry pad, cloth. Rinse with water.

Hacks 5. Keep Clean from Black sediment from the toilet with -Iron Out

Iron Out is the best automatic black ring remover. I personally used and got the benefits. I must say Iron Out is a value pack.

Here is the product description. Iron Out is a reputable company for its toilet-related products; use Iron Out Powder for better results.

Iron Out

How To Clean Black Ring Under Toilet Rim Forever | 6 Hacks


  • Features- 4.1 ratings, amazon’s choice, 6000+ happy users
  • Automatic Toilet Bowl Cleaner
  • Remove heavy rust stain
  • Septic safe
  • Safe for all toilets, toilet’s internal components, and septic system
  • Comes with spray, powder, and tablet forms
  • Last up to 45 days

Hacks6. The Ultimate protection From CLR is to remove Black Stain

CLR is a Calcium Lime Rust remover, the most powerful and heavy-duty toilet cleaner.

CLR is not only used for bathroom applications; it can also be used in multi-purpose like wash boats, washing old rusted tools, Showerhead, Siding, and Concrete.

CLR -Pro

How To Clean Black Ring Under Toilet Rim Forever | 6 Hacks


  • Nontoxic
  • Multi-purpose uses
  • EPA certified
  • Certified Climate Pledge Friendly
  • A streak-free gloss is achieved by breaking down calcium, lime, and soap scum.
  • 80% Plant-Based Ingredients
  • Eco friendly
  • Lemon Fragrance


  1. To eliminate mix CLR with worm water 50/50 ratio.

2. Spread over the mixture directly with the help of a brush, cloth, or sponge.

3. Leave for 2 mins and rinse with clean water.

4. If the ring does not go completely and has some residue, apply direct CLR in a small amount to the rings.

5. Rinse thoroughly 

Note- Reached out to children. Use gloves before heading the procedure. Avoid contact with the eye.

I don’t want to distract you with more methods. I have personally tried the following 6 methods once and asked my relatives to try. These have worked 100% of them. I think it will help you.

This is what to do when a black ring forms. But in my opinion, if you follow these 7 simple steps, then there will be no more spot return. And you don’t have to work so hard behind it.

After all, this black spot pointing your cleanliness.

How to prevent Black Stuff under the toilet rim

  1. Clean with toilet cleaner every alternative week
  2. If possible, keep light comes into your bathrooms to reduce moisture and avoid mold growth
  3. If possible open and clear the air inside the toilet
  4. If possible dry the toilet sink, drain
  5. Use soda and pour into toilet tank every two to three alternative days
  6. If possible, increase the filter rate of your water system
  7. Open toilet lid maximum time, by this mold growth rate, diminish
  8. Clean regularly and maintain the routine

Wrap On To Clean Black Ring Under Toilet Rim

Cleaning a lavatory is not a big deal until some stubborn and annoying rings occur. Me and my husband we are both frustrated with the ring issues. After trying different DIY hacks, Chemicals, sometimes the stains go, again come back. 

A year ago, I used Baking Soda Vinegar as an alternative day and cleaned our toilets every week by bathroom tends. I maintain this routine for almost 1 year, and believe me; any rings do not come back.

I’m thrilled and share with my friends, and relatives that they solve their problems doing such a simple job. Now it’s your turn to be happy cleaning the toilet.

Thank You

Frequently Asked Questions

Q1. What is the black stuff under the rim of the toilet?

Black stuff under the rim is nothing but mold formation or hard water minerals residue. Mainly Calcium is more likely caused for black rings. 

Q2. Does vinegar kill black mold?

Yes. Vinegar may kill black mold, but I recommend Baking soda along with Vinegar.
Is black mold in the toilet dangerous?
Yes, Black molds in the toilet are dangerous. They can cause UTIs, Respiratory infections, and renal infections sometimes.

Q3. How do I get rid of black stains in my toilet?

To get rid of black stains in your toilet by doing these methods-
1.Vinegar+Baking Soda
2. Bleaching method
3. Use a Pumice stone
4. Clean with all-purpose toilet cleaners
5. Use Iron Out
6. Use Eco-friendly hard water stain remover
7. The Ultimer- CLR

Q4. Why do toilets get dirty under the rim?

One of the main reasons that toilets get dirty under the rim is because of the way that they are used.

When people use the toilet, they tend to flush it with the handle facing away from them. This causes water to splash up onto the back of the toilet, and some of it will inevitably end up under the rim. Over time, this can result in a build-up of dirt and grime.

Another reason that toilets get dirty under the rim is because of improper cleaning. If you don’t clean your toilet regularly, then dirt and grime will have a chance to accumulate. When you do clean your toilet, be sure to pay special attention to the area under the rim. A good way to clean this area is to use a toilet brush.

Toilets can get dirty under the rim because of leaks. If your toilet has a slow leak, then water will slowly seep out from under the rim and onto the floor. This can create a breeding ground for bacteria and other germs. If you have a leaky toilet, it’s important to have it repaired as soon as possible.

All of these factors can contribute to a dirty toilet bowl. To keep your toilet clean, be sure to flush it with the handle facing away from you, clean it regularly with a toilet brush, and repair any leaks ASAP.

Leave a Comment