What Is The Best Temperature for Freshwater Angelfish? {pH & Hardness?}

If you are looking to keep angelfish you will need to know what is the best temperature for freshwater angelfish?

An important parameter is the temperature of the tank and each species of aquarium fish has its own suitable temperatures.

This article will focus on the Angelfish in freshwater to find out the best temperature for them.

What Is The Best Temperature for Freshwater Angelfish?

Freshwater Angelfish require water temperature within the range of 78°F to 84°F (26°C to 29°C).

Angelfish are particularly sensitive to their environment and will react quickly to any extreme change in their environmental factors.

Lower temperatures result in longer lifespan. The best way to keep the water temperature at the required temperature it to add an aquarium heater to your tank (Available from Amazon).

Can Angelfish Live in Cold Water?

Angelfish can tolerate water temperatures between 65°F and 84°F, Whilst they will survive in lower water temperatures they will not thrive in these conditions.

The ideal temperature for an angelfish is around 75°F, if you want to keep them in colder water there are a few things you will need to do such as

  • Make sure the water is well cleaned (Good filter).
  • Make sure the water is will aerated.

Do I Need To Add a Heater To My Angelfish Tank?

Yes, a heater will maintain a constant temperature in your aquarium which will help your angelfish to thrive.

If angelfish are kept on cold water they will not thrive and they will suffer from the following

  • More likely to develop a disease
  • Lifespan greatly reduced
  • Less likely to breed
  • Less active in the tank
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General Tank Requirements for Angelfish

Angelfish remains the top choice of many aquarists. This preference is because it is easy to take care of them and meet their requirements. However, they are not as hardy as most other species of aquarium fish.

Nevertheless, the first step to meeting your Angelfish needs is first to realize what these requirements are. Angelfish have standard requirements for tank parameters, including:

  • pH
  • temperature
  • salinity
  • ammonia level

Angelfish can accept a range of water temperatures. They often thrive best when you keep them at warmer temperatures.

  • The best temperature for Angelfish is usually between 78°F to 84°F.

Also, pH is another critical requirement of any fish tank. It measures the level of acidity or basicity of the fish tank.

  • The best pH for the Angelfish tank is usually between 56.8 and 7.8.

The degree of water hardness in the tank is also a crucial requirement in the tank. It can also be a decisive factor in the extent to which the fish will thrive in your tank.

  • The ideal water hardness for Angelfish tank is usually between 30 and 80 dKH [54 -145 ppm].

Once you ensure that all the parameters are in place, the rest is simple. Firstly, ensure the cleanliness of the tank.

  • Ensure that the ammonia and other toxin levels are at the barest minimum.

Housing Preparation for Angelfish Tank

If you already have an Angelfish in your tank, you should know how this is done.

First of all, you need to realize that your Angelfish likes and prefers a large tank. Aside from the fact that it will give them the chance to swim freely, it will also accommodate their growth.

Also, perform water changes of up to 10% to 25% weekly. This procedure will ensure that you maintain the level of these parameters. Similarly, you should make use of a proper filtration system and suitable cleaners.

Moreover, it would be best if you remembered to treat tap water before introducing it to the tank. Evacuate any dead or sick fish as soon as possible. You should also quarantine any new fish for up to two weeks before introducing them to your main tank.

Angelfish Fish Tank Size

Angelfish can grow up to 6-8 inches long. Therefore, you should prepare a tank that can accommodate their body size. Also, the fish tank size can depend on the number of fish you intend to keep in the fish tank.

Angelfish will require:

  • A tank of 55 gallons or more at full growth.
  • Tall aquariums will also be preferable for them because of their body shape.
  • The trick is that the bigger the tank, the better for angelfish.

You should also ensure a gentle flow of water. Angelfish are usually very sensitive to any form of disturbance, including noise and water movement.

Overcrowding Angelfish

It is essential to avoid keeping your Angelfish in overcrowded tanks. Overcrowding can make it difficult for your fish to thrive.

If you introduce Angelfish to the community tanks, you should pay attention to the type of members there. They can be easy prey for larger fish. They can also prey on the smaller fish and fry in the tank.

Similarly, if you want them to share the tank with other fish, make sure that they are compatible. Angelfish might have a hard time coping with aggressive and larger fish.

General Care for Angelfish

Caring for Angelfish is relatively easy and advantageous. This ease accounts for why it is considered a top pick for many aquarists, even beginners. Ensuring proper care for Angelfish will help you get the best of them.

It will:

  • increase their lifespan
  • improve their growth
  • and aid their breeding
  • lower the vulnerability of your fish to diseases and pests. 

Ensure a proper clean up routine for your tank. Ensure the removal of algae and other toxins.

1. Water Changes and Conditioners

You can achieve this by carrying out routine partial water changes of up to 25% weekly. Also, you should ensure the proper dechlorination of the new water to you intend to add to the tank.

Also, ensure the safety of your fish with the use of good conditioners. You can also secure their safety by eliminating any pests as soon as you detect them in your tank. Also, you should only keep them with suitable tank mates.

2. Boost Angelfish Wellness

You can also boost their wellness by making some beneficial additions. These additions include effective filtration, subdued lighting, and ideal water movement. Also, ensure that the tank is big enough to permit active swimming.

The addition of plants and decorations to the tank would be valuable. The plants will help the tank simulate the natural environment of the fish. Similarly, the plants will serve as hiding and resting places for Angelfish.


Angelfish are hardy, although they are not as hardy as some other species of aquarium fish. All you need to do is to meet their basic requirements. One of the essential tank requirements for freshwater Angelfish is the water temperature.

The temperature of the tank has a significant influence on Angelfish. They would have trouble coping in any fish tank that is either too hot or too cold.

Nevertheless, regulating the temperature is quite easy. You should also ensure that their tank conditions are perfect to ensure optimum growth.


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Hello, I'm Jason. I'm the guy behind HelpUsFish.com. I volunteer at my local fish shop and I created this site to offer tips and advice on the fish I care for.