What Is The Best Water Temperature For Your Neon Tetras

Minimum Water Temperature For Neon Tetras

If you are thinking of getting Neon Tetras, you should follow the various ways for their better care. Among many ways, following a proper water temperature for them tops the list. But there is a certain doubt in minds regarding the exact water temperature required for them. Hence, in this article, I will be explaining the accurate maximum and minimum water temperature for Neon Tetras.

To start, ‘What is the minimum water temperature for Neon tetras?’, the minimum water temperature for Neon Tetras is 72 degrees Fahrenheit (22 degrees Celsius). 

So, what is the maximum water temperature for Neon Tetras exactly? The maximum water temperature for Neon Tetras is 78 degrees Fahrenheit (25 degrees Celsius).

Therefore, the ideal water temperature for Neon Tetra is between 72 degree Fahrenheit to 78 degree Fahrenheit, i.e. 22 to 25 degree Celsius. Also, neon tetras require a water acidity or pH level of 6.2 maximum. 

It is extremely crucial to provide a specific minimum water temperature to Neon Tetras. Otherwise, it may go through many life-threatening conditions. So, a minimum of 72 degree Fahrenheit water condition is absolute for Neon Tetras to shine and live a healthy life. 

However, for better care of the Neon Tetra, people often confuse the absolute water temperature that is necessary for them.

So, in this article, I will be defining the water temperature for Neon Tetras not just only to survive but thrive better.

An Ideal Minimum Water Temperature For Neon Tetras

If you are one of the beginner fish keepers, then this is something you should not miss. Considering the water temperature and its pH level for any fish species is the most crucial thing.

Similarly, while you think of keeping a Neon Tetra in your aquarium, one of the most important things to know about is the accurate water temperature for them.

Therefore, the ideal minimum water temperature for Neon Tetras is 72 degrees Fahrenheit (22 degrees Celsius) with a minimum 5.5 pH level of water.

However, the required minimum water temperature is somewhat unlikely with the average room temperature.

But as the Neon Tetras are tropical fish, they surely need more water temperature when compared to room temperature.

Moreover, if the water temperature for Neon Tetras is below 72 degrees Fahrenheit, then it will not be safe for them. Hence, maintaining the ideal minimum water temperature for the Neon Tetras is essential.

If you want to learn more about Water Parameters for Tetra Fish: Stable Water Condition, then click here.

What Will Happen If The Water Temperature Is Lower Than Ideal Minimum Temperature?

For a healthy life of a Neon Tetra, a minimum water temperature of 72 degrees Fahrenheit (22 degrees Celsius) is ideal. If not then, your Neon Tetras are not safe.

The Neon Tetras will feel trouble in the water temperature below 72 degrees Fahrenheit. They will get highly inactive. And there will be a decline in their appetite.

Not only this, but the metabolism in their body will get extremely low. These changes in the Neon tetra later develop in some critical life-threatening situations.

Therefore, maintaining ideal water temperature for the Neon Tetras are crucial for their healthy life.

If Your Neon Tetra Is Not Eating? – Here Is What You Can Do. You will find out the reasons and solutions in the same article.

An Absolute Maximum Water Temperature For Neon Tetras

The Neon Tetras are tropical freshwater fish. So, to house them in an aquarium, absolute maximum water temperature is necessary. It is the most required thing for keeping the Neon Tetras safe and sound.

Especially if you are a beginner fish keeper, you should not miss this. And learn the right maximum water temperature for Neon Tetras more precisely.

Learn more about neon tetras in our article, ‘Neon Tetra: A Complete Care Guide For Beginners.’

The absolute maximum water temperature for Neon Tetras is 78 degrees Fahrenheit (25 degrees Celsius). Also, a maximum of 6.2 pH levels is ideal.

As they are tropical fish, neon tetras need a higher water temperature to grow and shine better. This is compared to the average room temperature in an aquarium.

But remember, the water temperature should not exceed 78 degrees Fahrenheit. The Neon Tetras indeed require a bit higher water temperature. But more than the requisite temperature will be risky for them.

What Will Happen If The Water Temperature Is Higher Than Absolute Maximum Temperature?

The Neon Tetras can finely live up to the water temperature of a maximum of 78 degrees Fahrenheit.

But if the temperature rises above the maximum level, the Neon Tetras can be at risk. And of course, you would not want to.

If the water temperature is higher than the absolute maximum temperature, the water will get too warm. Such water is not safe for Neon Tetras. They will start feeling discomfort and get very dull.

Also, the metabolism in the body of the Neon Tetra will speed up quicker. It further leads to the shortening of their life expectancy, or they may die sooner.

Besides, there will be a high possibility of developing some life-threatening sickness too. It is because the Neon Tetras will lack in appetite, which can later affect their body harshly.

Hence, maintaining absolute water temperature for the Neon Tetras are vital for their healthy growth.

You can increase the horizon of your knowledge about Tetra Fish Diseases and Treatments here.

How To Control The Water Temperature Precisely?

As stated before, the Neon Tetras should be in an aquarium with absolute water temperature to live finely.

If you fail to provide an accurate water temperature to them, they can suffer through severe life-threatening conditions. So, it is crucial to control the water temperature precisely without any error.

For this, here are some ways that you can obtain to control the water temperature more precisely:

Does Neon Tetra Tank Needs Aquarium Heater?

Being a tropical freshwater fish, the Neon Tetras need accurate water temperature in the aquarium. For this, an aquarium heater is suitable to control the often fluctuating water temperature.

In the aquarium heater, there is a mark that indicates how high the water temperature should specifically get or limit. You can then set the temperature limit in the heater.

Later, if the water temperature fluctuates, the heater will work and reach up to the specified mark. Also, it manages the water temperature without exceeding the temperature mark.

But remember, set the water temperature only up to the maximum level that the Neon Tetras requires.

In this way, the aquarium heater can help to control the fluctuating water temperature. Thus, you can get an aquarium heater to ensure a pleasant environment for your Neon Tetras.

I suggest you get AQQA Mini Submersible Aquarium Heater. It is the best in the market at an affordable price.

Use of Aquarium Thermometer

An aquarium thermometer is as vital as the aquarium heater. A thermometer helps to detect the exact water temperature at any time.

If the thermometer shows any fluctuation, you can know the change happening in the water temperature.

Later, the heater will start working too, which keeps the temperature under control. Therefore, the aquarium thermometer is necessary to control the water temperature in the aquarium.

Fish Tank Thermometer, Touch Screen Digital Aquarium Thermometer with LCD Display, Stick-on Temperature Sensor ensures Optimum Temperature in your aquarium for the neon tetras.

You can check out how to ‘Maintain Tetra Fish Tank Temperature Without Heater During Power Outage’.

The Necessity Of Temperature While Changing Water

It is essential to change the water of an aquarium where your Neon Tetras are. If you do not know, then learn that Neon Tetras are quite sensitive to water changes.

So, you should carefully complete the entire process of changing the water in the tank without scarring the Tetras.

However, the changes in water conditions in an aquarium are vital. Note that 20 to 25% of water changes is crucial every week.

Also, remember to adjust the temperature of the freshwater, which you will further add to the aquarium.

Here, the minimum water temperature in the tank is 72 degrees Fahrenheit and the maximum water temperature necessary for Neon Tetras is 78 degrees Fahrenheit.

While changing the water, make sure the freshwater has at least 70 degrees Fahrenheit temperature.

Do not pour all 20 to 25% of freshwater at once. Add them to the tank gradually. It will help Neon Tetras to stay firm.

And the replaced water can slowly mark up to the minimum water temperature. While you change the water, do not go for more than 25% of freshwater. Because too many changes can be distressing for Neon Tetras.

Some Points To Consider With Water Temperature

Apart from the water temperature, here are certain things that you shouldn’t miss:

  • The medium level of water hardness is suitable for Neon Tetras. It means that there should not contain too many dissolved minerals.
  • The Neon Tetras mostly prefer clear water. So, water changes in the tank are significant. However, this process should not harm or scare the Neon Tetras in any way.
  • While maintaining ideal minimum water temperature for Neon Tetras, manage at least 5.5 pH level for them. These water temperatures and pH level are specific and requisite for their strong and healthy life.

Here is something more about ‘How to Increase the pH of Your Freshwater Aquarium?’


In conclusion, Neon Tetras are the most popular freshwater tropical fish that add their shine and beauty to the aquarium. To take good care of this attractive fish, you will primarily have to look for the maintenance of water temperature for them.

They can suffer from several life-threatening situations, which of course, you would not want to happen. So, it is better to watch and maintain the ideal water temperature between 72-78 degree Fahrenheit (22-25 degree Celsius) to keep the Neon Tetras safe. For this, you can get a water heater and a thermometer.

I hope this article was useful to you in learning about the ideal water temperature required for your Neon Tetras.

Related article:

  1. Can The Neon Tetra Survive In a Fishbowl?
  2. Can The Neon Tetra Eat Goldfish Flakes?
  3. What Do Neon Tetras Need In Their Tank?
  4. Can Neon Tetra Survive In Cold Water?
  5. How to Prevent Neon Tetra Curved/Crooked Spine or Neon Tetra Disease

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