How To Clean A Toilet Tank Mold

Ever washed your toilet and you still perceive a bad smell that seems as if you didn’t wash the toilet well or makes it look like there is a part you missed out on? Then finding out how to clean a toilet tank mold is certainly a good idea.

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The toilet tank is a major part of the toilet, the other being the toilet bowl. The tank is the upper part of the toilet that stores as much as two gallons of water.

Toilet Tank Molds

Since the toilet tank is neglected most times when washing the toilet, the toilet tank, which is supposed to have dirt free and debris free water, now comes up with molds and other mineral deposits.

What Are Molds?

Mold is a type of fungus which grows on several kinds of surfaces but it commonly grows on damp surfaces.

A mold problem can occur in any room, as long as there is some form of moisture either from plumbing difficulty or increased levels of air humidity.

Bathrooms and toilets are places likely to have molds as there are a lot of places that are damp and clear for moisture collection.

For the toilet tank which is usually covered, a dark and warm temperature environment ensues, which is perfect for mold to thrive.

Also toilets that are not flushed regularly are more likely to develop spores than regularly flushed toilets.

What Are The Effects Of Molds On Us?

Molds can cause numerous health conditions. Being exposed to mold either through touch or through inhalation can lead to coughing, sneezing, wheezing or congestion of the nose.

It can also induce asthma symptoms in people with that condition and cause health complications for people with compromised immune systems or existing health issues.

Molds are a danger to health and have to be removed immediately.

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How To Clean Toilet Tank Mold

To clean a toilet tank, the following materials are needed:

  1. Rubber gloves
  2. White Vinegar
  3. All purpose cleaner
  4. Scrub brush with plastic bristles


The first step is to put on your rubber gloves. The gloves serve as protection from germs and chemicals.


Next you open the toilet tank and pour as much vinegar as possible. It could be as much as three gallons depending on the size of your tank.

Vinegar is used here instead of bleach as bleach is corrosive and can affect other parts of the tank.


After that, let the vinegar stay in the tank for at least five minutes to work on discoloration, residue at the bottom of the tank and mineral deposits and molds that have built up overtime.


After waiting at least five minutes, flush the toilet at least twice to remove all the vinegar that is present in the tank. Ensure you flush till all the vinegar is removed.


The next step is to turn off water supply. In order to achieve this, find the water valve which is usually on the wall or close to the base of the toilet. After finding the valve, close it.


After that, lift the toilet tank lid and flush the toilet until the water drains completely.


After the water has drained completely, apply all purpose cleaner and scrub inside of tank. Using the brush, ensure you scrub all the major parts of the tank thoroughly, leaving no part untouched.

It is recommended to use a new brush instead of the brush already in your toilet so that you would not introduce germs.

Ensure you use a scrub brush with plastic bristles with a shape that would allow you get to different corners without stress.


Turn the water back on and flush the toilet again until water in the tank and bowl is clear.

Now, let’s watch this video for a visual representation of what to do:

Ways To Prevent Mold In The First Place

There is the popular line that goes ‘prevention is better than cure’ and in dealing with molds, it is couldn’t be more correct.

The best method of dealing with mold is to prevent them. Ensure you clean your toilet regularly at least once a week using an anti-fungal spray.

To reduce moisture in and around the toilet and bathroom steps have to be taken. A shower fan can be used to prevent moisture.

Other alternatives include opening the window or using a dehumidifier. Also, ensure that plumbing leaks are repaired as soon as they are noticed.

If you think there is any leak anywhere around the bathroom or toilet, fix it or call a plumber as soon as possible.

You can also install tank insulation to keep the tank water cool. Tank insulation provides a layer between the walls of the tank and the air which is outside the toilet.

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