Buenos Aires Tetra Care: Tank Setup, Diet, Tank Mates, Diseases & More!

If you’re a fish enthusiast, you’ve probably heard of the Buenos Aires Tetra. This species of fish is a popular choice for aquariums due to its striking appearance and ease of care. However, taking care of these fish requires some knowledge and effort. In this article, we’ll cover everything you need to know about Buenos Aires Tetra care, from their diet to their ideal living conditions.

Buenos Aires Tetra is a popular freshwater aquarium fish with a lifespan of 5 years. They require a minimum tank size of 20 gallons and prefer a pH range of 6.5-7.5. They are omnivorous and should be fed a varied diet of flakes, pellets, and live/frozen foods. Regular water changes and proper filtration are necessary for their well-being.

First of all, it’s important to note that Buenos Aires Tetras are a schooling fish. This means that they thrive in groups of six or more, so if you’re planning on keeping them, you’ll need to make sure you have enough space in your aquarium. Additionally, these fish are omnivores, which means they eat both plants and meat. You can feed them a variety of foods, including flakes, pellets, and frozen or live foods like brine shrimp or bloodworms.

When it comes to their living conditions, Buenos Aires Tetras prefer a well-planted aquarium with plenty of hiding places. They also require a moderate water flow and a neutral pH level. It’s important to keep the water clean and well-oxygenated, as these fish are sensitive to poor water quality. By following these care guidelines, you can ensure that your Buenos Aires Tetras live a happy and healthy life in your aquarium.

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Species Summary

If you’ve decided to add Buenos Aires Tetras to your aquarium, it’s important to know everything there is to know about their care.

In this section, we’ll provide a summary of the species, covering their origin, lifespan, appearance, size, growth rate, behavior and temperament, and differences between males and females.


Buenos Aires Tetras are native to South America, specifically the Paraná River basin. They are commonly found in Argentina, Brazil, Paraguay, and Uruguay.

They prefer slow-moving waters with plenty of vegetation, but they can adapt to a variety of environments.


Buenos Aires Tetras typically live for 3-5 years in captivity, although some have been known to live for up to 8 years with proper care.


Buenos Aires Tetras are known for their striking appearance. They have a silver body with a black stripe that runs horizontally along their sides.

They also have a red spot on their dorsal fin, which becomes more prominent during breeding season. Their fins are clear with a slight yellow tint.


Buenos Aires Tetras can grow up to 3 inches in length, although they typically reach a size of 2-2.5 inches in captivity.

Growth Rate

The growth rate of Buenos Aires Tetras can vary depending on factors such as water quality, diet, and tank size. With proper care, they can grow up to 1 inch per year.

Behavior & Temperament

Buenos Aires Tetras are active and social fish that do well in groups of 5 or more. They are not aggressive towards other fish, but they can be nippy towards fish with long fins. They are also known to be jumpers, so it’s important to have a secure lid on your aquarium.

Male vs Female

It can be difficult to distinguish between male and female Buenos Aires Tetras, but during breeding season, males will develop a more prominent red spot on their dorsal fin. Females are typically larger and rounder than males.

When I first added Buenos Aires Tetras to my aquarium, I was amazed by their striking appearance and active behavior.

I quickly learned that they do well in groups, and I enjoyed watching them swim and play together. With proper care, these fish can be a beautiful and engaging addition to any aquarium.

Tank Setup

Setting up a tank for your Buenos Aires Tetra is an important step in ensuring their health and happiness. Here are some key factors to consider:

Tank Size

You should aim for a minimum tank size of 20 gallons for a small school of Buenos Aires Tetras.

A larger tank is always better, as it provides more swimming space and allows for a larger school.

Keep in mind that these fish are active swimmers and need room to move around.


Lighting is important for both the health of your fish and the growth of any live plants in your tank.

Aim for 8-10 hours of light per day, and consider using a timer to ensure consistency. LED lights are a great option, as they are energy-efficient and long-lasting.

Filtration & Aeration

A good filtration system is essential for maintaining water quality and keeping your fish healthy.

A canister filter or power filter is recommended for a 20-gallon tank. In addition, an air stone or bubbler can help to increase oxygen levels in the water.


Buenos Aires Tetras prefer water temperatures between 72-79°F. A heater is necessary to maintain a consistent temperature in your tank.

Choose a heater that is appropriate for the size of your tank.


Gravel or sand are good options for substrate in your tank. Avoid sharp or rough gravel that could harm your fish. A depth of 2-3 inches is recommended.


Provide plenty of hiding spots and areas for your fish to explore.

Rocks, driftwood, and caves are all great options. Avoid decorations with sharp edges or small openings that could trap your fish.


Live plants can provide a natural environment for your fish and help to maintain water quality.

Consider plants like Java Moss or Anubias, which are easy to care for and can thrive in a variety of lighting conditions.

Overall, setting up a tank for your Buenos Aires Tetra requires careful consideration of their needs.

By providing the right environment, you can ensure a happy and healthy life for your fish.

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Personally, I found that adding some live plants to my tank not only helped maintain water quality, but also added a beautiful natural touch to the overall look of the aquarium. It’s also fun to watch your fish swim around and interact with their environment!

Water Quality

When it comes to caring for your Buenos Aires Tetra, maintaining good water quality is crucial. Here are some factors to keep in mind:

Water Temperature

You should aim to keep the water temperature between 72°F and 82°F (22°C to 28°C).

Make sure to use a reliable thermometer to monitor the temperature, and adjust your heater as needed.

Water pH

The ideal pH range for Buenos Aires Tetra is between 6.5 and 7.5. If the pH is too low or too high, it can cause stress and health issues for your fish.

Test the pH regularly using a test kit, and adjust it with a pH buffer if necessary.

Water Hardness

Buenos Aires Tetra prefer slightly hard water, with a hardness level between 5 and 20 dGH.

You can test the hardness using a test kit, and adjust it with a water softener or conditioner if needed.

Water Changes

Regular water changes are essential for maintaining good water quality. Aim to change 25% of the water in your tank every two weeks.

You can use a siphon to remove debris and waste from the bottom of the tank, and replace the water with fresh, treated water that is the same temperature as the tank.

Personally, I have found that keeping a regular schedule for water changes helps me stay on track and keep my Buenos Aires Tetra healthy. I set a reminder on my phone to go off every two weeks, so I never forget!

Tank Maintenance

Keeping your Buenos Aires Tetra’s tank clean is essential for their health and wellbeing. Here are some key tips to keep in mind:

First, make sure to perform regular water changes. Aim for a 25% water change every 2-4 weeks. This will help keep the water clean and reduce the buildup of harmful chemicals and bacteria.

Second, use a good quality filter to help keep the tank clean. There are many different types of filters available, so make sure to choose one that is appropriate for the size of your tank.

Third, regularly test the water to make sure that the levels of ammonia, nitrite, and nitrate are within safe ranges. You can purchase test kits at most pet stores or online.

Fourth, clean the tank and any decorations or plants regularly. Use a gravel vacuum to remove any debris from the bottom of the tank, and wipe down the walls with an aquarium-safe cleaner.

Finally, make sure to monitor your Tetra’s behavior and health closely. If you notice any signs of illness or stress, such as lethargy, loss of appetite, or unusual swimming behavior, take action immediately.

Personally, I’ve found that keeping a regular cleaning schedule helps me stay on top of tank maintenance. I like to set a reminder on my phone to perform a water change every other Saturday, for example. It’s also helpful to keep a log of when you perform maintenance tasks, so you can track any changes in water quality or Tetra behavior over time.

Tank Mates

Compatible Fish Species

If you want to keep Buenos Aires Tetras with other fish, you need to choose wisely.

These fish are generally peaceful, but they can be aggressive towards smaller fish.

Good tank mates for Buenos Aires Tetras include other medium-sized fish that are peaceful and can tolerate the same water conditions.

Some compatible fish species include:

  • Angelfish
  • Barbs
  • Gouramis
  • Rasboras
  • Swordtails

Incompatible Fish Species

While Buenos Aires Tetras are generally peaceful, they can become aggressive towards smaller fish.

You should avoid keeping them with fish that are too small or too slow-moving.

Some incompatible fish species include:

  • Guppies
  • Tetras
  • Neon Tetras
  • Shrimp
  • Snails

How Many Buenos Aires Tetra Should I Get?

The number of Buenos Aires Tetras you should get depends on the size of your tank. As a general rule, you should have at least 6-8 tetras in your tank, but you can keep more if you have a larger tank.

I personally keep 10 Buenos Aires Tetras in my 30-gallon tank, and they seem to be happy and healthy. When adding new fish to your tank, it’s important to do so slowly and carefully.

You should never add too many fish at once, as this can cause stress and even death. Instead, add a few fish at a time and monitor their behavior closely.

Remember, choosing the right tank mates for your Buenos Aires Tetras is important for their health and happiness.

By selecting compatible fish species and avoiding incompatible ones, you can create a peaceful and harmonious aquarium environment.


Proper diet is essential for the health and well-being of your Buenos Aires Tetra fish.

In this section, we will discuss what to feed your fish, how often to feed them, and some tips to ensure they are getting the nutrition they need.

What To Feed

When it comes to feeding your Buenos Aires Tetra fish, they are not picky eaters. They will eat just about anything you give them.

However, it is important to provide them with a balanced diet that includes both dry and live foods.

Some good options for dry food include flakes, pellets, and granules. Look for high-quality brands that are specifically formulated for tetra fish.

For live food, you can offer brine shrimp, bloodworms, and daphnia. These foods will provide your fish with the nutrients they need to thrive.


How often you feed your Buenos Aires Tetra fish will depend on their age and size. As a general rule, adult fish should be fed twice a day, while younger fish may require more frequent feedings.

Be sure to only feed your fish what they can consume in a few minutes to avoid overfeeding, which can lead to health problems and water quality issues.


Here are a few tips to keep in mind when feeding your Buenos Aires Tetra fish:

  • Provide a variety of foods to ensure your fish are getting a balanced diet.
  • Remove any uneaten food from the tank to prevent it from fouling the water.
  • Consider using a feeding ring or target feeding to ensure all your fish get their fair share of food.
  • Do not feed your fish for one day per week to help prevent digestive issues.

Personally, I have found that my Buenos Aires Tetra fish love frozen bloodworms. They go crazy for them and it is fun to watch them eat. However, I always make sure to only give them a small amount to prevent overfeeding.

Common Diseases

As with any pet, Buenos Aires Tetras are susceptible to various diseases.

Being aware of the common diseases that can affect your fish, their symptoms, and how to treat and prevent them can help you keep your fish healthy and happy.


Some common diseases that Buenos Aires Tetras can get include:

  • Ich (white spot disease)
  • Fin rot
  • Columnaris (mouth fungus)
  • Velvet disease


If your fish is sick, you may notice some of the following symptoms:

  • White spots on the fins or body (Ich)
  • Torn or ragged fins (Fin rot)
  • White patches on the mouth or gills (Columnaris)
  • Yellow or brownish-gold dust on the body (Velvet disease)

Other symptoms can include lethargy, loss of appetite, and abnormal swimming behavior.


If you suspect that your fish is sick, it’s important to take action quickly to prevent the disease from spreading to other fish in the tank. Treatment options can include:

  • Medications
  • Water changes
  • Quarantine

It’s important to follow the instructions on any medication carefully and to continue treatment until the disease is completely gone.


The best way to prevent diseases in your Buenos Aires Tetras is to maintain good water quality and to avoid introducing sick fish into your tank.

Regular water changes, proper filtration, and a healthy diet can all help keep your fish healthy and disease-free.

As an anecdote, I once had a Buenos Aires Tetra that developed fin rot. I noticed that its fins were torn and ragged, and it was swimming abnormally.

I quickly treated it with medication and made sure to keep the water clean. Within a week, its fins had started to heal, and it was swimming normally again.

By catching the disease early and taking action, I was able to save my fish.

Signs of a Healthy Buenos Aires Tetra

Keeping your Buenos Aires Tetra healthy is important for their longevity and happiness. Here are some signs that your fish is healthy:

  • Their scales are bright and shiny
  • They are active and swimming around
  • They have a good appetite and are eating regularly
  • Their fins are not clamped or frayed
  • They are not gasping for air at the surface

If you notice any signs of illness, such as lethargy, loss of appetite, or abnormal swimming behavior, it is important to take action quickly to prevent any further health problems.

I once had a Buenos Aires Tetra that suddenly became lethargic and stopped eating.

I took it to the vet and found out that it had an infection. With the help of medication and proper care, my fish made a full recovery.

Remember to always keep an eye on your fish and seek professional help if needed.

Signs Your Buenos Aires Tetra Is Sick

If you’re a fish owner, you know how important it is to keep an eye on your pet’s health. Here are some signs that your Buenos Aires Tetra may be sick:

  1. Loss of Appetite: If your Tetra is not eating, it could be a sign of illness. Fish that are not eating may be suffering from an infection or other health issue.
  2. Lethargy: If your Tetra is not swimming around and seems to be lethargic, it could be a sign of illness. Fish that are not active may be suffering from a bacterial or parasitic infection.
  3. Faded Colors: If your Tetra’s colors are fading, it could be a sign of illness. Fish that are not feeling well may lose their vibrant colors.
  4. Gasping for Air: If your Tetra is gasping for air at the surface of the water, it could be a sign of illness. Fish that are struggling to breathe may be suffering from a respiratory infection or other health issue.
  5. Red or Inflamed Gills: If your Tetra’s gills appear red or inflamed, it could be a sign of illness. Fish with red or inflamed gills may be suffering from a bacterial or parasitic infection.

Remember, if you notice any of these signs in your Buenos Aires Tetra, it’s important to take action right away.

Consult with a veterinarian who specializes in fish care or a knowledgeable aquarium store employee to determine the best course of treatment.

Personal Anecdote: I once noticed that my Tetra wasn’t eating and seemed to be lethargic. I immediately took action and consulted with a fish expert who recommended a course of antibiotics.

Within a few days, my Tetra was back to its active and healthy self. It’s always better to be safe than sorry when it comes to your pet’s health.


Breeding Buenos Aires Tetras is a rewarding experience and can be done with a little bit of knowledge and preparation. Here is what you need to know about breeding these fish.

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Breeding Setup

To breed Buenos Aires Tetras, you will need a breeding tank that is at least 20 gallons in size.

The tank should be heavily planted with live plants and have a pH between 6.5 and 7.5. The water temperature should be around 78°F.

How To Breed

The breeding process for Buenos Aires Tetras is relatively easy. First, you will need to introduce a male and female into the breeding tank.

The male will begin to chase the female around the tank, and eventually, the female will lay her eggs on the plants. Once the eggs are laid, the male will fertilize them.

After the eggs are fertilized, they will hatch in about 24 to 36 hours. The fry will be free-swimming after about 5 days.


It is important to provide proper care for the fry once they hatch. They should be fed small amounts of baby brine shrimp or crushed flakes several times a day.

The water in the breeding tank should be kept clean, and the temperature should be maintained at around 78°F.

It is also important to separate the fry from the adult fish, as they may eat them. Once the fry are large enough, they can be moved to a grow-out tank.

I have found that breeding Buenos Aires Tetras can be a fun and rewarding experience. Watching the male chase the female around the tank and seeing the eggs hatch into fry is truly amazing.

Just remember to provide proper care for the fry, and you will have a successful breeding experience.

Product recommendations for Buenos Aires Tetra:

  1. TetraColor Tropical Flakes – This is a high-quality fish food that is perfect for Buenos Aires Tetra. It contains all the essential nutrients that your fish need to stay healthy and vibrant.
  2. Marina LED Aquarium Kit – This is a great aquarium kit that is perfect for Buenos Aires Tetra. It comes with everything you need to get started, including a filter, heater, and LED lighting.
  3. API Aquarium Water Test Kit – It is important to keep an eye on the water quality in your aquarium, and this test kit makes it easy to do so. It includes tests for ammonia, nitrite, nitrate, and pH.
  4. Seachem Prime– This is a water conditioner that helps to detoxify ammonia, nitrite, and nitrate in your aquarium. It is safe for use with Buenos Aires Tetra and other fish.
  5. CaribSea Eco-Complete Planted Aquarium Substrate – This substrate is perfect for creating a natural environment for your Buenos Aires Tetra. It contains live bacteria and is easy to maintain.
  6. AquaClear Power Filter – This filter is highly effective at removing debris and maintaining water quality in your aquarium. It is also very quiet and easy to maintain.
  7. Aqueon Aquarium Water Changer – This device makes it easy to perform regular water changes in your aquarium. It is designed to be safe and easy to use, and can help to keep your Buenos Aires Tetra healthy.
  8. Fluval Sea Protein Skimmer – This protein skimmer is perfect for removing organic waste from your aquarium. It is easy to install and maintain, and will keep the water in your aquarium clean and healthy.
  9. NICREW ClassicLED Aquarium Light – This LED light is perfect for illuminating your aquarium and showcasing your Buenos Aires Tetra. It is energy-efficient and easy to install.


Now that you have all the information you need about Buenos Aires Tetra care, you are equipped to provide the best possible environment for your fish. Remember to keep their tank clean and well-maintained, and to provide them with a varied diet that includes both flakes and live food.

It’s important to note that while Buenos Aires Tetras are hardy fish, they still require proper care and attention. Make sure to monitor their behavior and health regularly, and address any issues promptly.

Overall, caring for Buenos Aires Tetras can be a rewarding experience. I personally have enjoyed watching their vibrant colors and playful behavior in my own aquarium. With the right care and attention, your Buenos Aires Tetras can thrive and bring joy to your home as well.


If you’re new to keeping Buenos Aires Tetras, you may have some questions. Here are some frequently asked questions:

Q: What should I feed my Buenos Aires Tetras?

A: Buenos Aires Tetras are omnivores and will eat almost anything. You can feed them a variety of foods, including flakes, pellets, frozen or live foods, and even vegetables like peas or spinach. Just make sure to vary their diet to keep them healthy and happy.

Q: How often should I clean my tank?

A: You should do a partial water change of about 25% every 2-3 weeks. You should also vacuum the gravel during each water change to remove any uneaten food or waste. A thorough cleaning of the tank should be done every 6-8 weeks.

Q: Can Buenos Aires Tetras live with other fish?

A: Yes, they can live with other peaceful fish of similar size. However, avoid keeping them with smaller fish that they may see as food, or with aggressive fish that may nip at their fins.

Q: Do Buenos Aires Tetras need a heater?

A: Yes, they do. They are tropical fish and need to be kept in water that is between 72-82°F (22-28°C).

Q: How many Buenos Aires Tetras should I keep together?

A: You should keep them in groups of at least 5-6 individuals. They are social fish and will be happier and less stressed in a group.

When I first got my Buenos Aires Tetras, I was worried about how to take care of them properly. But after doing some research and asking questions, I found that they are actually quite easy to care for. As long as you provide them with a varied diet, keep their tank clean, and provide them with a heater and some friends to swim with, they will thrive in your aquarium.

Reference: Wikipedia.


Hi there! My name is Jacob, and I'm the founder of this Pet people blog that talks all about aquarium and fishkeeping. I've been passionate about fish and aquatic life since I was a kid, and I've spent countless hours learning about different species, their habitats, and how to create the perfect environment for them to thrive in.

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