all types of fish tank

what temperature should my fish tank be?

In this article, we will cover how to keep your fish tank at the right temperature. It is important to know how fast the water is heating up so you can set your heater accordingly. The article talks about some general rules for setting the temperature for your tank but also gives information on how to adjust it based on what type of fish you have in your tank.

What is the best temperature for a fish tank?

temperature for fish tank

One of the most important things in a fish tank is the temperature of the water. Fish are cold-blooded, so they are susceptible to changes in water temperature.

The optimal range for aquariums is 68-80 degrees Fahrenheit, with some variations depending on specific species.

Some fish are more sensitive to the temperature of their environment. For example, some types of cichlids are known to prefer warmer water environments while others prefer cooler water environments.

Aquarium temperature is critical because, when the temperature changes too much or too quickly, different problems can occur, such as…

  • The algae growth can change the tank’s chemical balance
  • Bacteria growth that may lead to fish illness or fatalities
  • Changes in the water oxygenation levels
  • Impacting fishes’ metabolism, which impacts feeding needs
  • Changing the breeding readiness of different fish

One of the most important factors in fishkeeping is the water temperature. This is due to their sensitivity to changes in temperature, and many species have specific temperature requirements. What’s more, it is not just the water that needs to be kept at a certain temperature but also the ambient or room temperature needs to be considered too.

let us now see the temperature for different species.


maximum temperature for fish tank betta fish

According to aquarium experts, the best temperature for a betta fish is 78-82 degrees Fahrenheit.

We should not put our betta fish in water that is too cold or too warm, as these temperatures can cause the fish to become uncomfortable.

Bettas are naturally tropical fish. They live in warm streams in the wild which can get up to 80°F to 90°F during the day. The temperature drops by a few degrees at night, but it is not a risk to the health of bettas. That take us to another point which is, using heaters is not an option for betta setups, it is an essential item that is necessary for their health and longevity.

temperature for betta fish
betta fish


temperature for fish tank guppies

Guppies need warm water so, the temperature for fish tank guppies should be in the range of fish tank temperature celsius 22°C to 27°C

(72 °F – 65 °F).

The water should not be in the range of 28°C to 32°C because it will kill the guppies faster.

pair in mind that, If you live in a climate where the outdoor temperature drops under 68 °F (20 °C) in the winter, most likely you will need an aquarium heater.

temperature for fish tank guppies
temperature for guppies


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What Is The Best Aquarium Heater 2021

temperature for fish tank goldfish

Goldfish are a type of fish that require a temperature of about 68-76 degrees Fahrenheit, This helps keep their environment healthy and make sure that they are comfortable. Goldfish usually need to have a few feet of water, so it is important to make sure that their tank has enough space for them to swim around comfortably.

Goldfish can be kept in tanks or ponds, but they need a filter to keep the water clean and healthy. A heater is also needed for a tank to maintain a temperature of about 65°F to 85°F.

gold fish temperature
gold fish temperature


maximum temperature for betta fish

Some betta fish enthusiasts believe that the water temperature should stay below 80° F (26° C), while others believe that it can go up to 85° F (29° C). However, most experts agree that the best temperature for betta fish is 76° F (24° C).

Remember that the temperature of your tank doesn’t have to be too high or too low, just be sure to have a thermometer in there.

If the water is not heated enough, it will become stagnant and bacteria can grow. If it is heated too much, it can lead to negative effects on the fish like stress and fin erosion.

Betta fish are tropical fish and need to be housed at a constant temperature of 76 degrees Fahrenheit. They require a heater to maintain this temperature.

betta aquarium temperature
betta aquarium temperature

Aquarium Temperature Control

It is mentioned that fish tanks should have a temperature of 68 degrees F or higher, and any temperature goes below 68 degrees F can lead to illness and death for the fish.

One way to control the temperature of a fish tank is to place the aquarium in a room that remains at a constant temperature and is not too hot or too cold. The most important factor in determining how warm or cool your aquarium needs to be is the type of fish you plan on keeping in it. For instance, if you plan on keeping tropical fish, you will need to keep your tank warmer than if you were keeping goldfish.

Another important thing to consider when deciding the best temperature for your tank is what kind of water conditioner you use. Some types of water conditioners can make it difficult for the water in the tank to maintain an even temperature; this will result in fluctuations that can make it hard for your fish to survive.


Q & A Aquarium Temperature 


Can fish die if the water is too warm?

Just like humans, fish do not have sweat glands. They are only able to release water through their gills. So if the temperature of the water is too high, they will die.

One of the main things that fish need to survive is the temperature of water.

To maintain a healthy and long-living fish, it’s important to know what kind of water temperature they prefer.

Typically, cold water fish such as trout and salmon prefer temperatures in the range of 50 to 60 degrees Fahrenheit.

Older goldfish prefer warmer temperatures between 65 and 72 degrees Fahrenheit.

Fish that live in tropical seas such as clownfish or coral reef dwellers need to be in much warmer waters around 82 degrees Fahrenheit.

more info about

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Can goldfish survive 90 degree water?

A goldfish can survive in 90 degree Fahrenheit water for a short amount of time. The problem is that they cannot regulate their body’s temperature and they will eventually die.

After some time, the goldfish will start to show signs of distress and die within six hours. They may even start to gasp for air as the gills will dry out and stop working properly.

If it is a fish tank, then it is possible that fish can survive with water that is 90 degrees Fahrenheit for up to four days before showing distress signs.

How do you know when tank is ready for fish?

The best way to know if your tank is ready for fish is by looking for these two things:

– Is it more than 5 gallons?

– Does it have a filter, heater, and light?

If the answer to both of these questions is yes then you are ready for some fish.

What kills the most fish?

Fish in an aquarium can be killed by a variety of things. The most common one is probably diseases due to their weak immune system and the unstable environment that they live in. Poor water quality is also a frequent cause of death for these creatures because they need clean water to stay healthy and happy. And finally, sometimes other fish introduced into the tank will eat them or disrupt their comfortable habitat.


Are Digital aquarium thermometers accurate?

Digital aquarium thermometers are a popular device in the pet trade, but are they accurate?

No. They measure the temperature from the surface of the water and not from its core.

In conclusion, there is no way for a digital thermometer to accurately measure what is going on inside an aquarium. you can measure the temperature of the water several times and take the average.


How long should a fish tank run before adding fish?

Fish need to be introduced into the tank gradually. Ideally, the water should be run for at least 24 hours before adding fish. This gives the bacteria in the filter time to clean up any ammonia or nitrite that might have come out of the tap water.

How long should I let my tank cycle before adding fish?

The cycling process is a biological process that ensures that the tank is clean and safe enough for fish. Cycling involves the establishment of beneficial bacteria that are able to break down toxic waste in the tank.

It’s necessary to cycle a tank before adding any fish, but it doesn’t take more than 10 days, so there is no need to worry about it being too long of a period.

People often have this question because they are afraid of over-stressing their fish and not giving them enough time to adjust to their new environment.

The best way to understand how long your tank needs to cycle before adding fish is by understanding the size of the tank, what kind of water you’re using, and how many filters you have. Different factors can make cycling time longer.

Can goldfish live in tap water?

Yes, a goldfish can live in tap water. They are a freshwater fish and will require a tank with fresh water to survive. However, Tap water is not recommended because it contains chemicals and other elements that can harm the fish by the time.

Can fish burn themselves on heater?

This might sound like a silly question, but it is actually quite a serious one. Fish are generally very sensitive to heat and can easily burn themselves on heaters that are too hot. In fact, even if the heater is not too hot for human touch, it is probably still too warm for the fish.

There are many different factors that can affect how much heat an animal will feel from an object including their size, how dense their fur or skin is, and whether they have any water between them and the heater source.

An animal’s ability to sense temperature can also play a role in how they react to temperatures.

The sensitivity of a fish to temperature depends on its size as well as its form of locomotion.

Can angelfish live in 70 degree water?

It is not recommended for angelfish to be in 70 degree water. They should be in warmer water, at least 80 degrees.

The fish could not survive if the water were colder than 50 degrees because the fish would lose its body heat to the surrounding waters.

in a nutshell, angelfish are tropical fish and need a water temperature of at least 70 degrees Fahrenheit.


In this article we covered a lot of topics about the aquarium temperature. what should be the min and the max temperature in general for any aquarium.

Also we covered the ideal temperature for, betta fish, goldfish, guppies and the temperature control.
We mentioned that some aquariums need heater to keep the fish safe and in good health.
Finally, we answered most of questions a lot of people asking such as :

Can fish die if the water is too warm?
Can goldfish survive 90 degree water?
Can fish burn themselves on heater?
How long should I let my tank cycle before adding fish?
Can angelfish live in 70 degree water?
How long should I let my tank cycle before adding fish?

This is everything about aquarium temperature and how you can keep the different species of fish safe and in a great health.

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