Betta Fish Water Temperature-The Ultimate Guide(2021)

Betta fish with awesome colors and iridescent scales is the most beautiful aquarium pet.

You can easily buy them from a pet shop by the name of Siamese fighting fish. As their name indicates, they are known for their fighting nature. Pet owners also bet for the fish who will win in a fight. They are found in the tropical and shallow waters of Thailand.

When seeking the answer for the best betta fish water temperature, their wild habitat gives you a good idea. They need warmer water with plants and light. Optimum temperature is necessary for the health and activity of betta.

Many betta fish keepers are curious to maintain the ideal temperature of the tank. As the inappropriate temperature can create health issues for the betta. It can cause stress, infection, or disturbance in the metabolic process.

Betta fish are able to tolerate some fluctuations in temperature. But the too cold or too hot temperature affects betta negatively.

What should be the best betta fish water temperature?

How you can maintain the ideal temperature for a betta?

These are general queries of every betta keeper. In this post, you will get the authentic and best guide for betta temperature requirements.

Let’s dive right in:

Why your Betta Needs Optimum Temperatur

The optimum and best temperature for a betta fish is their first requirement when setting the habitat in captivity.

Like other pets, betta fish requires an ideal temperature for their growth and development. Betta fish are cold-blooded animals.

They cannot withstand the severity of temperature as they cannot maintain constant body temperature. In the same way, betta body temperature also fluctuates with the external environment.

For example, if the temperature of waterfalls to 70 Fahrenheit or below, betta will tend to adjust its body temperature. And they will enter into a state of low metabolic activity.

Temperature shocks create many health issues for the betta, and death may occur if prolonged.For your betta fish to be healthy, provide ideal water temperature in the tank.

Betta Fish Water Temperature
Water photo created by wirestock –

What is the Ideal Temperature for Your Betta

By now, we have learned that Betta is a tropical fish living in the slow-flowing and warm water of Thailand. In wild, they commonly live in the shallow water of ponds, ditches, and rice paddies.

Betta prefers to live at the proper temperature needed for its growth and development. According to PETA, the ideal temperature for a betta is 76 to 82 degrees Fahrenheit. Betta is sensitive to temperature and prefers warm water to live in.

Another important factor is that betta requires more warm water than other tropical fish. It’s a misconception and myth that betta can live in a small bowl or bottle. Betta requires at least 5 gallons of water with maintained temperature.

Betta can withstand a temperature from 72 to 88 degree Fahrenheit-that’s out of the ideal range. In this deviated temperature range, betta tries to just survive not to develop and grow.

Betta utilizes all its energy and stored food to adjust itself to the external temperature. It either suppresses its activities or overstimulates.

What Harm Does Too High Temperature Gives to Betta

Metabolic efficiency and the life of betta are co-related. And this co-relation is dependent on the proper temperature. If the temperature exceeds 85 degrees Fahrenheit, it’s too high for the betta to be healthy and active. Majorly, too high temperature gives the following harm to the betta.

Decrease oxygen availability: A great point of concern with hot temperature is there will not be enough oxygen in the water for the betta. Warm water has less dissolved oxygen as the molecules move faster. Therefore, betta gets oxygen through excessive breathing.

Increase metabolic process: The science behind the high temperature is that the metabolic process of betta speeds up. It moves in the tank at a faster rate and utilizes all of its energy.
Reduce Lifespan: As by the increase in metabolic process, the betta ages more quickly and the lifespan of betta is shortened. Betta fish can live more in the best temperature range.

How to Recognize Your Betta is Too Hot

Definitely, betta will not be normal at a high temperature. If you observe the following signs, it means your betta is withstanding too high temperature.

Swims rapidly: As the temperature becomes too hot for a betta, they swim rapidly to and fro in the tank. They become overstimulated and hyperactive. That’s not normal. Also, betta gets stressed in hot water.

Excessive Breathing: Yes, you will observe betta breathes more frequently and excessively to meet their oxygen supply. Excessive breathing of betta is the first sign of too hot temperature.

Adheres to Surface: Too hot temperature is not best for a betta to keep them normal in the tank. Betta will prefer to adhere to the surface of the tank to get sufficient oxygen for your breathing.

What Harm Does Too Cold Temperature Give to Betta

Betta prefers warmer water than cold water. Because cold water has more adverse effects on the betta. Anyhow, a temperature lower than 72 degrees is too cold for the betta. As you know, betta needs warmth from the external environment, i.e., water. Too cold water will give the following harm to the betta.

Decrease Metabolic process: As opposite to high temperature, the cold temperature reduces the metabolic activity and process of betta. Betta will be more passive for movement or sticks to floating on one side. Their metabolic process will run at a snail’s pace and may become susceptible to diseases.

Weakens Immune System: A great harm that betta will face is the immune system will be weakened. Any parasite or fungal infection will invade the betta. Your betta eyes can protrude, resulting in a popeye disease.

How to Recognize Your Betta is Too Cold

You can easily recognize your betta is too cold by observing the following symptoms and signs.

Passive or no Movement: if the temperature is not best for betta fish like too cold, they will show passive movements. In this case, betta can swim will only one side of the tank. Or they can settle to the bottom of the tank, showing no movement.

Lethargy: The most visible symptom you will observe is lethargy. In too cold water, betta will not have enough energy for swimming. They will tend to slow down in both behavior and swimming. Sometimes, betta can get into a comma owing to cold temperature.

Frequent Sickness: Reduced metabolism and weakened immune system lead to the frequent sickness of betta fish. From stress to infection and other life-threatening diseases easily overcomes betta.

How to Provide Constant Temperature to Betta

As a betta fish keeper, providing the best temperature to betta fish is your responsibility. It is as not as complicated as you consider.

The temperature of fish tank water can be changed either by a change in room temperature or when you add water to the tank. Now, you know what ideal temperature should betta fish water be.

It will be easy for you to maintain the temperature. By following these ways, you can provide the best temperature to the betta fish.

Maintain Size of Tank

This is the myth that betta can live in a small bowl or bottle. You cannot maintain the temperature of water in a bowl.

PETA recommends placing betta fish in at least 5-gallon water. It will be easy to maintain the best temperature in 5-7 gallon water than in the bowl. Keep the tank away from windows and place it in a warmer part of the house. It is a good measure to keep the lid closed to prevent heat from moving out.

Use a Heater

A heater is the best choice to maintain the temperature of a fish tank. You can adjust the temperature of the tank as per the ideal range provided. Various heaters are available in the market, you can buy one according to your choice and budget. But be responsible to buy a good and effective heater for the betta.

Use a Thermometer

The thermometer is necessary to balance the temperature of the water. The Aquarium thermometer will monitor the temperature so that it may not exceed the provided limit. Timely check the thermometer to adjust the temperature to best for betta fish.

Bottom Line

From all the conclusions, it is clear that the best temperature for betta fish is 76 to 82 degrees. Bettas are cold-blooded animals and need warmth from the external environment. The ideal temperature is a primary requirement for a betta to thrive in a better way. Different options are available to provide a constant temperature for the betta.


How Long Can Betta Fish Survive In Cold Water?

It is difficult for betta fish to survive in cold water. They become susceptible to diseases in cold water from stress to fatal diseases. Coldwater decreases the lifespan of beta. Betta can survive up to six months in cold water. But in rare cases, betta can die immediately.

How to Warm Up Water Without a Heater?

If you don’t have a heater, choose an alternative option. You can keep the tank or bowl of betta in contact with sunlight. Or you can use incandescent or fluorescents lights to warm up the water. Lastly, you can keep the tank in the warmer area of the house. Changing existing with warmer water can be a good option but follow the guidelines.

How to Know Betta Fish is Stressed?

Different symptoms show that your betta is stressed. The faded color, clamped fins, inactivity, and lethargy are the major symptoms of stress for the betta. In the case of significant stress, betta will show odd swimming behaviors.

So that’s all for my guide to best betta fish water temperature.
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