How many Angelfish in a 25-gallon tank?

In this post, we will discuss the topic “How many Angelfish in a 25-gallon tank” and tips about Angelfish aquariums. We will also suggest some fish species that are good Angelfish tankmates in community tanks.

How many Angelfish in a 25-gallon tank?

A 25-gallon tank can fit a maximum of 2 fully grown Angelfish. Angelfish need to swim, explore and establish their territory in a fish tank and a 25-gallon tank makes this doable. It is also possible to form a small community in a 25-gallon tank.

What you should know about Angelfish

Angelfish are very popular triangular-shaped freshwater fish. They are classified as semi-aggressive because, in some conditions, they may become aggressive or territorial. However, most of the time, these fish are peaceful.

They require low effort to keep them. Which make them good choices for beginners and community tanks. On average, they measure up to 6 inches in length and 10 inches in height. In captivity, Angelfish live for around 12 years.

The recommendation is to feed them twice a day. As omnivores, this should be done by offering them some fresh vegetables, live bloodworms and brine shrimp, freeze-dried items, and some industrialized flakes and pellets.

What are the best tank mates for Angelfish?

Although they are semi-aggressive fish, in general, they remain pacific. Thus, they can be kept in community tanks with many tank mates.

Tankmates should not be aggressive or become fin-nippers at some point. Also, it is important to highlight they cannot be small enough to be eaten by the Angelfish or big enough to attack them. 

Here, we have some of the Angelfish best tank mates:

Bristlenose Pleco – 10/10                                                 

Bristlenose plecos are natural to the same region as the Angelfish, the Amazon River basin. However, they are bottom-dwellers. This means they feed mostly on material sunk or growing in the bottom of the tank. They are very peaceful fish species that can do well with many others. Additionally, they are not demanding fish that enjoy planted tanks.

They also feed on the growing algae, which will help you with water quality control. Water temperatures should be between 70 and 77 degrees Fahrenheit and they can grow up to 6 inches.

Corydoras catfish – 10/10

Corydoras catfish or only corys are a group of several species. They are, in general, great inhabitants of community tanks. And similarly to the plecos, they occupy the bottom layer of the tank. 

Corys are also very peaceful bottom-dweller with a very relaxed temper. Also easy to maintain and should be placed in small groups of 3 or 4. Their water temperature requirement is around 72-78 degrees Fahrenheit. And they can grow up to 2.5 inches.

Keyhole Cichlids – 10/10

The Keyhole Cichlids are one of the most peaceful Cichlids. For this, they are quite popular among Cichlids aquarists. They are hardy fish and are not fin nippers. Additionally, they own amazing personalities.

Their requirement regarding temperature is to keep it between 74 and 82 degrees Fahrenheit. They are also nor demanding species and grow up to 5 inches.

Molly fish – 10/10

Molly fish are also good tank mates to Angelfish. They are very popular fish and very common to find in home aquariums. They are soft tempered fish with amazing colouration patterns.

They are hardy fish also and breed very easily. They grow up to 3 inches and their temperature requirements range from 70 to 82 degrees Fahrenheit.

Platy fish – 10/10

Platies are highly recommended fish for novice hobbyists. They are hardy fish and have a very relaxed temper. They look amazing in bright colours. They also breed very quickly, thus be careful to avoid overpopulation. Their water temperature requirements range between 68 and 79 degrees Fahrenheit and they grow up to 2.5 inches.

Angelfish tank tips

Angelfish natural habitats are the calm placid waters from the Amazon River basin. Warmer temperatures and great vegetation is a must in Angelfish tanks.

Water parameters

Water parameter is the most important tank characteristic. Controlling them will guarantee lower contaminant levels and thus, lower vulnerability to diseases and stress. 

Some equipment may assist you in controlling and stabilizing some of these parameters, such as filters and heaters. Temperatures should be stable and a bit warm, ranging from 78 to 84 degrees Fahrenheit and pH levels between 6 and 8.

Tank size

Due to the Angelfish temperament and size, it is required around 16 to 20-gallon per fish for a tank. They require plenty of room to have plants and substrate in place, as well as to swim around and explore.

Although Angelfish are not schooling fish, they appreciate being in small groups rather than being left alone, once they feel more secure in the companion of equals. A 25-gallon tank can house 2 fully grown Angelfish. 

Plants and Substrate

One important point when setting up a fish tank is their natural habitat. The more natural the tank look, the happier the fish. Thus, having some live plants such as Java moss, Java fern, Acharis, or Amazon sword will make the tank look similar to their natural environment.

Substrate should be fine sandy as they enjoy picking the leftover on the bottom. They also appreciate plenty of hiding spots. 

25-gallon tank dimensions

A standard 25-gallon tank dimension is 24 x 12 x 20 inches. However, it is likely to find many other formats and proportions. This tank general weight when filled is around 282 lbs.

5 Benefits of a 25-gallon tank

1.   Perfect balance between unstably small and the expensively large tanks;

2.   Enough room for interesting creatures;

3.   Accommodate more fish and larger groups;

4.   It is a good tank size, it fits into most rooms;

5.   Not too demanding.

25-gallon tank equipment

Tank equipment is extremely important to keep your fish healthy and varies from tank to tank. 

–       Filter: filtration system. Most important equipment in tanks and assist with water aeration.

–       Heater and thermometer: tropical tanks must have these to keep temperature stable. 

–       Lights: this is very specific to each of the species you are counting in your tank;

–       Air pump: although angelfish do not need this one, other several fish species could benefit from more aeration.

25-gallon community tank combination

A 25-gallon tank makes it possible to set up a small non-complex community with Angelfish. The combinations are endless, but here are two suggestions for a peaceful tropical tank;

–       2 Angelfish + 3 Corydoras catfish + 4 Mystery snails

–       2 Angelfish + 5 Cherry shrimp + 5 snails


In this post, we discussed “How many angelfish in a 25-gallon tank” and tips about Angelfish aquariums. We also suggested some fish species that are good Angelfish tankmates in community tanks.

If you have any thoughts or doubts, feel free to drop us in a comment below!

Frequently Asked Questions (FAQs): How many Angelfish in a 25-gallon tank

How many Angelfish can you put in a 26-gallon tank?

It is possible to keep 2 Angelfish in a 26-gallon tank. The tank space is calculated using the potential size of the fish plus extra gallons for diverse things, such as plants, substrate, and décor.

How big do Angelfish get in captivity?

Captive Angelfish can grow up to 6 inches long and 10 inches tall. 

How many times a day do you feed Angelfish?

Younger Angelfish should be fed at least 3 or 4 times a day. However, as they get older, this must change to twice a day. Otherwise, the adult Angelfish can become overweight.

Can Angelfish live without an aerator?

Angelfish require aerators. However, they do not need bubblers. Angelfish tanks need filtration systems. These systems already generate enough aeration for the Angelfish.

Are bloodworms good for Angelfish?

Angelfish appreciate bloodworms. The rule of thumb about bloodworm offer to Angelfish is once per week.

Do Angelfish change colour?

Yes, Angelfish are capable of changing their colour due to chromatophores and iridophores in their dermis. These cells work for reflecting the light and generating bright colours.


How many Angelfish in my Tank? (From 25 to 125 Gallons).

Angelfish Care Guide.

Angelfish Complete Care Guide, Size, Life Span, Tank Mates, Breeding. 2020.

Jason. 2017. 15 Great Angelfish Tank Mates (Complete Compatibility Guide).

How Many Angelfish Should Be Kept Together?

How many Angelfish? 3 Methods for Calculating How Many Angelfish You Can Put in Your Aquarium. 2012.