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What Is The Minimum Water Temperature For Neon Tetras

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It is no doubt the Neon Tetra has been the most popular freshwater tropical fish species at present. Due to the Neon Tetra’s exciting features, many aquarists prefer keeping them at their aquarium. Also, it is not very tough to maintain and care for them. That’s why it has been quite ideal for beginner fish keepers as well.

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). Also, it requires a medium level of water hardness, having a minimum 5.5 pH level.

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 minimum water temperature that is necessary for them. So, in this article, I will be defining the minimum 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. 

You can get a complete guide about neon tetras in our article, ‘Neon Tetra: A Complete Care Guide For Beginners.’

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 (22degrees 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 develops 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.

Does Neon Tetra Need A Water Heater?

Yes, to ensure the accurate water temperature for the Neon Tetras, you will need a water heater. The Neon Tetras are tropical fish. So, it is significant to maintain the water temperature of their aquarium for their survival. 

To observe the exact water temperature, you can get a water heater with a good thermometer. In every water heater, there is a mark, which indicates the specific level of high water temperature that you have set.

If the water temperature gets low in the aquarium, the water heater will start working. It works to increase and reach the set mark of water temperature. On the other hand, the correct aquarium thermometer helps you to know about the temperature of the water at anytime.

For the aquarium heater, I will suggest you AQQA Mini Submersible Aquarium Heater. Similarly, for aquarium thermometer, Fish Tank Thermometer, Touch Screen Digital Aquarium Thermometer with LCD Display, Stick-on Temperature Sensor is best to ensure the optimum temperature!

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. So, the freshwater should hold at least the minimum temperature as per the requisite for Neon Tetras. 

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 Minimum 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 temperature 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?’


The Neon Tetras are the most popular freshwater tropical fish that adds 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.

As discussed, the water temperature for Neon Tetras should be a minimum of 72 degrees Fahrenheit (22 degrees Celsius). If the water temperature falls from this ideal level, then it will not be safe for your Neon Tetras.

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 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 minimum water temperature required for your Neon Tetras. 

Related article:

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

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