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Number of Clownfish vs. Tank Gallon Size [Complete GUIDE]

The freshwater clownfish is a popular aquarium fish because of its beauty and rarity. Their varied coloration, patterning, and refined appearance make them a welcome addition to any fish tank. Keep in mind that clownfish have particular needs in terms of tank size and water quality. In this article, we will provide a detailed tutorial on figuring out which dimension tank is best for your clownfish and how to set up their habitat properly.

Clownfish Tank Size Guide: How Many Clownfish Can You Keep in a 20-gallon Aquarium?

Due to its maximal size and level of aggression, it is advised that only one clownfish be kept in a 20-gallon aquarium. Clownfish have a maximum length of 3 to 4 inches, and they can exhibit territorial behavior.

The Ocellaris clownfish, which may reach a maximum length of 3 inches, is the smallest species of clownfish, while the Maroon clownfish, which can reach a maximum length of 6 inches, is the largest. As a result, it’s crucial to take into account the exact species while figuring out how many clownfish to keep in a 20-gallon tank.

A tank of at least 20 gallons is advised for a single clownfish.

Giving a pair of clownfish at least a 30-gallon tank is advised based on their maximum size and temperament.

Different Species Sizes and Accommodation in a 20-Gallon Tank:

Clownfish can grow to different sizes depending on the species. Clownfish are popular aquarium inhabitants, and several varieties exist beyond the Ocellaris and Maroon clownfish. Clownfish come in a wide range of sizes, and here are some examples:

Percula Clownfish

It is a type of clownfish that can reach a maximum size of 3 inches.

Tomato Clownfish

It is also called the Red Clownfish and can reach a maximum size of 5 inches.

Clarkii Clownfish

The Clarkii Clownfish is a little species of clownfish that can nevertheless reach a length of 6 inches.

Black and white striped Skunk Clownfish

Black and white striped Skunk Clownfish can reach a maximum length of 4 inches.

It’s crucial to take into account the size and temperament of the clownfish species you choose to house in your 20-gallon aquarium. The Percula Clownfish, for instance, is well-suited to a 20-gallon aquarium because of its modest size and pleasant personality.

Factors to Consider When Determining Tank Size for Clownfish

A few considerations exist when deciding the best tank size for your clownfish. Fish characteristics include physical dimensions, activity levels, and social interactions with other fish.

Size of the Fish

Clownfish can reach lengths of up to 6 inches, and as such, they require ample room to swim and explore. No more than one adult Clownfish should be kept in 20 gallons of water. As a result, two Clownfish may live happily in a 40-gallon aquarium, whereas three can live in a 50-gallon aquarium.

Clownfish are known for their rapid growth; if their tank is too small, they may quickly overrun it. Despite their reduced size, Clownfish youngsters nevertheless have certain needs when it comes to their surroundings.

Aggression Level

Clownfish are very aggressive and territorial. Due to their aggressive behavior, they can be accommodated as a single clownfish in a tank, or a breeding pair can be accommodated. No more than two clownfish can be housed in a 40-gallon tank.

Clownfish compatibility with other fishes:

Clownfish are known to attack other fish, especially if they are similar in size or shape. When picking clownfish tankmates, bear this in mind.

Clownfish are more compatible with peaceful, smaller fish. Pygmy Clownfish, mandarin fish, and superb dartfish are compatible. These gentle fish lessen aquarium hostility because they don’t threaten the clownfish.

Red coris wrasse, yellow tang, and damselfish can live alongside clownfish, but they must be monitored to ensure they are not bullied.

Clownfish should not be kept with more aggressive fish like royal dottybacks. These species are territorial and may threaten clownfish, causing stress and injury.

Setting Up the Ideal Environment for Clownfish

After settling on a tank size just right for your clownfish, it’s time to create an atmosphere as close as possible to their original habitat. This includes giving them places to hide, a foraging-friendly substrate, and a clean environment in which to live.

Hiding Places

Clownfish are known to be territorial and aggressive if they believe their territory is being invaded. A more natural and peaceful atmosphere can be achieved by giving them plenty of places to hide.

Your Clownfish will appreciate the natural atmosphere you create with the help of live plants, pebbles, and driftwood.

Substrate

while natural explorers, Clownfish, need a substrate that doesn’t restrict their movement while they look for food. A sandy or fine-gravel ground is advised to simulate their natural habitat best and encourage natural browsing behavior.

Water Quality

Clownfish flourish in a certain set of water parameters. They prefer a pH range of 8.0 to 8.4, salinity of 1.020 – 1.024, and a 24 to 27 degrees Centigrade temperature range.

It is critical to keep water parameters consistent by making regular water changes and monitoring the tank’s water chemistry. Using a high-quality filter can also assist in maintaining.

Keep reading: How to Naturally Lower PH in Aquarium

Choosing the Right Tank Size for Clownfish

Our Clownfish’s size and activity level should guide your decision on the tank size. Clownfish, which may reach a length of up to 6 inches when fully grown, have large space needs.

A single Clownfish requires a minimum of 20 gallons of water, and each additional fish need 10 gallons. However, fish can benefit from less antagonism if they have more room to swim in a larger tank.

Do Clownfish Need a Big Tank? 

To ensure clownfish health, beginners should use a larger tank. Clownfish need room to swim and explore. More water volume decreases contaminants, making a larger tank more stable and improving water quality. A larger tank allows for additional decorations and hiding spots, which reduces fish stress and creates a more natural environment. While clownfish can be housed in smaller aquariums, beginners should use a larger tank to create a better environment and simplify water quality maintenance.

Accommodation of more than two clownfish in a tank

Adding a third clownfish in a 20-gallon tank with two clownfish may upset the hierarchy and territorial borders. Aggression and stress may kill the third clownfish.

Before adding clownfish, make sure the tank is big enough. As indicated, a clownfish needs at least 10 gallons (38 liters) of water. Therefore a 20-gallon tank can hold two but not three. To reduce hostility and stress, closely monitor a third clownfish in a tank and provide plenty of hiding spots.

Single Clownfish in a tank

Clownfish are very territorial and aggressive in groups. Therefore, an individual can be kept in a tank. Clownfish are curious and don’t like interacting with other fish. Boredom and loneliness are not issues for clownfish and don’t affect their health. Therefore, having a single Clownfish in a tank with many ornaments and hiding spots is favorable. For their gregarious nature, two Clownfish are recommended per aquarium.

Only male Clownfish living together in the 20-gallon tank

Keeping just male Clownfish in a tank might cause discrimination and enmity. Male Clownfish are possessive and hostile toward other males, especially during the breeding season. Fish may fight and be injured. Maintaining a balance of male and female Clownfish in a tank prevents aggression and maintains harmony. To avoid territorial behavior, keep only male Clownfish and give lots of hiding places and visible barriers. Keep a mix of male and female Clownfish to keep a healthy aquarium.

Breeding Clownfish

If managed properly, Clownfish breeding is a rewarding hobby. Breeding requires reproducing their native habitat. This would have an acidic body of water with lots of vegetation.

Clownfish preparing to reproduce groom a smooth surface to lay their eggs on and perform courtship rituals. After laying eggs, male and female Clownfish fertilize and protect themselves.

Fry can survive on their yolk sac for a few days. Feeding them newly hatched brine shrimp or micro worms improves their chances.

Clownfish breeding requires strict environmental control. Before breeding your Clownfish, learn as much as possible and consult experienced aquarists.

Keeping Clownfish in a glass bowl

Keeping Clownfish in a glass bowl is not advised since this can harm their health. Clownfish can only flourish in conditions where they have plenty of room to swim, good water quality, and enough filtration. Fish kept in glass bowls may suffer from poor water quality and other health problems due to the bowls’ tiny size, lack of filtration, and inadequate aeration. In addition, Clownfish are curious, active fish that benefit from having lots of room to swim around in. This is why it’s crucial to supply your Clownfish with a clean, well-maintained tank of the appropriate size.

Aquarium Decorations for Clownfish

Clownfish health may depend partly on the ornaments you use in their aquarium. Providing them with places to hide and establish territories can help keep them calm and content in their tank.

Clownfish tanks can be decorated with pebbles, driftwood, and live plants. They can also be used to create an environment that looks and feels just like the animal’s native habitat.

Some aquarium ornaments, including rocks with sharp or rough edges, can be dangerous to your Clownfish. Before adding anything to the aquarium, a thorough inspection should be performed to identify and eliminate any hazards.

Fishes to be accommodated with Clownfish

The following types of fish can be accommodated with Clownfish:

  • Pygmy Angelfish
  • Chromis Damselfish
  • Basslets
  • Yellow Tang
  • Mandarin Dragonet
  • Dartfish
  • Red Coris Wrasse
  • Sea Anemones
  • Blood Red Fire Shrimp
  • Hermit Crabs

Conclusion:

  • According to the Clownfish Tank Size Guide provided in the article, a single clownfish requires at least a 20-gallon tank.
  • Keeping only two clownfish in a single, whether 20 gallons or more giant, is highly recommended.
  • High surveillance is needed in the Introduction of the third clownfish in a tank with two clownfish.
  • Proper water parameters should be maintained for the healthy environment of the tank.

Q/As

How many gallons do four clownfish need?

The recommended minimum tank size for four clownfish is around 40-50 gallons (150-190 liters), which means providing at least 10-12 gallons (38-45 liters) of water per clownfish.

How many clownfish can you have in a 20-gallon tank?

Generally, a 20-gallon (75 liters) tank is suitable for a pair of clownfish, as long as the tank is properly equipped with adequate filtration and aeration and there are hiding places and decorations to create a natural environment.

How many clownfish can you have in a 10-gallon tank?

A 20-gallon tank is the minimum size tank for the accommodation of Clownfish.

How many clownfish can you have in a 15-gallon tank?

A 20-gallon tank is the minimum size tank for the accommodation of Clownfish.

Can I keep two clownfish in a 5-gallon tank?

A 20-gallon tank is the minimum size tank for the accommodation of Clownfish.

Can you have six clownfish in one tank?

While it is technically possible to have six clownfish in one tank, keeping that many clownfish together is generally not recommended, as it can increase the risk of aggression, stress, and health problems for the fish.

How many gallons do three clownfish need?

30-40 Gallons are recommended, but proper surveillance is necessary for a tank having three clownfish. Otherwise, the third clownfish will be killed by the previous two clownfish.

How many clownfish can I put in a 55-gallon tank?

In general, a 55-gallon tank is suitable for four clownfish, which means providing at least 10-12 gallons (38-45 liters) of water per clownfish as long as the tank is properly equipped with adequate filtration and aeration, and there are hiding places and decorations to create a natural environment.

How many clownfish can you have in a 60-gallon tank?

It is highly recommended to adjust only two clownfish in a tank. Whether the tank is small (20 gallons) or large (60 gallons) because the introduction of a third one will not be appreciated, and its life will be in danger.

While keeping only a pair of clownfish in a 20-gallon tank is generally recommended, a 60-gallon tank provides more space and can potentially accommodate more fish. However, it is important to consider the species of clownfish and their temperaments before adding more fish to the tank.

In a 60-gallon tank, it is possible to keep up to 4 or 5 clownfish.

How much space do two clownfish need?

20 Gallon tank.

How many Litres do two clownfish need?

75 liters.

How Many Clownfish Can Live in a 90-gallon Tank?

It is highly recommended to adjust only two clownfish in a tank, whether small (20 gallons) or large (60 gallons), because introducing a third one will not be appreciated, and its life will be in danger.

While keeping only a pair of clownfish in a 20-gallon tank is generally recommended, a 60-gallon tank provides more space and can potentially accommodate more fish. However, it is important to consider the species of clownfish and their temperaments before adding more fish to the tank.

In a 90-gallon tank, it is possible to keep up to 6 clownfish.

How Many Clownfish Can Stay Together in a 75-Gallon Tank?

It is highly recommended to adjust only two clownfish in a tank, whether small (20 gallons) or large (60 gallons), because introducing a third one will not be appreciated, and its life will be in danger.

While keeping only a pair of clownfish in a 20-gallon tank is generally recommended, a 60-gallon tank provides more space and can potentially accommodate more fish. However, it is important to consider the species of clownfish and their temperaments before adding more fish to the tank.

In a 60-gallon tank, it is possible to keep up to 6 clownfish.

How Many Clownfish Can Reside Peacefully in a 10-Gallon Tank?

A 10-gallon tank is not recommended for keeping Clownfish.

How Many Percula Clownfish Can Live Together in a 30-Gallon Tank?

A single Percula clownfish can be adjusted in a 30-gallon tank.

How Many Ocellaris Clownfish Can Live Together in a 20-gallon Tank?

A single Ocellaris Clownfish can be accommodated in a 20 gallons tank.

How Many Mocha Storm Clownfish Can Live Together in a 30-gallon Tank?

A single Mocha Storm clownfish can be adjusted in a 30-gallon tank.

How Many Maroon Clownfish Can Live Together in a 35-gallon Tank?

A single Maroom Storm clownfish can be adjusted in a 35-gallon tank.

How Many Tomato Clownfish Can Live Together in a 40-gallon Tank?

A single pair can be adjusted in a 40-gallon tank.

How Many Red Sea Clownfish Can Live Together in a 45-gallon Tank?

A single Red Sea clownfish can be adjusted in a 45-gallon tank.

How Many Allard’s Clownfish Can Live Together in a 60-gallon Tank?

A single pair of Allard’s clownfish can be adjusted in a 35-gallon tank.

How Many Blue Striped Clownfish Can Live Together in an 80-gallon Tank?

A single pair can be adjusted in an 80-gallon tank.

How Many Pink Skunk Clownfish Can Live Together in a 55-gallon Tank?

A single pair can be adjusted in a 55-gallon tank.