Mastering Bloodfin Tetra Care: Tank Setup, Diet, Tank Mates & More!

If you’re looking for an easy-to-care-for fish that will add some color and life to your aquarium, the Bloodfin Tetra might be just what you need. These small, active fish are known for their bright red fins and their ability to get along with a variety of other fish species. In this article, I’ll share everything you need to know about Bloodfin Tetra care, from setting up their tank to feeding and breeding them.

Bloodfin tetras require a well-maintained aquarium with suitable water conditions, a varied diet, and a peaceful environment. They need a pH range of 6.0-8.0 and a temperature range between 72-82°F. The aquarium should be planted, and regular water changes should be performed to ensure their health. They are peaceful and social fish, making them an excellent choice for community tanks.

As a longtime aquarium enthusiast, I’ve had my fair share of experience with Bloodfin Tetras. These fish are hardy and adaptable, making them a great choice for both beginners and experienced fishkeepers alike. In this article, I’ll be drawing on my own experiences as well as the latest research and advice from experts in the field to provide a comprehensive guide to Bloodfin Tetra care.

Bloodfin Tetra Pet people Blog

Species Summary


Bloodfin Tetras are native to South America, specifically the Paraguay and Paraná River basins. They are commonly found in slow-moving waters, such as streams, ponds, and rivers with dense vegetation.


On average, Bloodfin Tetras live for about 3-5 years in captivity. However, with proper care and a healthy environment, they can live up to 8 years.


Bloodfin Tetras are small, slender fish with a bright red tail and a silver body. They have a distinctive blood-red fin on their dorsal fin, which gives them their name. They also have a small adipose fin and an elongated anal fin.


Adult Bloodfin Tetras can grow up to 2 inches in length. However, they are typically smaller, with most specimens reaching a maximum of 1.5 inches.

Growth rate

The growth rate of Bloodfin Tetras is relatively slow, with most fish reaching their full size within a year. However, growth rate can be influenced by factors such as diet, water quality, and tank size.

Behavior & Temperament

Bloodfin Tetras are peaceful fish that are ideal for community aquariums. They are active swimmers and enjoy swimming in schools of 6 or more. They are not aggressive towards other fish, but can become nippy towards other tetras if they feel threatened or overcrowded.

Male vs Female

Males and females are difficult to tell apart, but females tend to be slightly larger and rounder than males. During breeding season, males may develop a brighter red coloration on their fins.

Personally, I have found that Bloodfin Tetras are a joy to keep in a community tank. They are active, peaceful, and add a pop of color to any aquarium. However, it is important to keep them in a school of 6 or more to ensure their happiness and well-being.

Habitat and Tank Requirements

Tank Size

When it comes to Bloodfin Tetra care, the first thing to consider is the tank size. As a general rule, the tank should be at least 20 gallons for a small group of 6-8 tetras.

A larger tank will provide more swimming space and help to reduce aggression among the tetras.


Lighting is an important factor in the health and wellbeing of Bloodfin Tetras. A moderate level of lighting is recommended, as too much light can lead to algae growth and stress in the fish.

A timer can be used to ensure a consistent lighting schedule.

Filtration and Aeration

A good filtration system is essential for maintaining a healthy environment for Bloodfin Tetras.

A hang-on-back or canister filter is recommended, with a flow rate of 5-10 times the volume of the tank per hour. Aeration is also important, as it helps to increase oxygen levels in the water.


Bloodfin Tetras are tropical fish and require a consistent water temperature of 72-82°F. A heater should be used to maintain the proper temperature in the tank.


A fine-grained substrate, such as sand or gravel, is recommended for Bloodfin Tetras. This will allow them to forage for food and create a more natural environment.


Decorations such as rocks, driftwood, and caves provide hiding places for Bloodfin Tetras and can help to reduce stress. Avoid sharp or rough decorations that can injure the fish.


Live plants are a great addition to a Bloodfin Tetra tank. They provide oxygen, absorb nitrates, and create a more natural environment.

Plants such as Java Fern, Anubias, and Amazon Sword are good choices. I remember when I first set up my Bloodfin Tetra tank.

I was so excited to see these beautiful fish swimming around. I made sure to provide them with plenty of hiding places and a varied diet.

It wasn’t long before they started to show their personalities and became a favorite of mine. Now, I can’t imagine my tank without them.

Water Parameters

Water Temperature

The ideal water temperature for Bloodfin Tetras is between 72-82°F (22-28°C).

It’s important to maintain a consistent temperature, as sudden changes can cause stress and illness. I personally use a submersible heater to regulate the temperature in my tank.

Water pH

Bloodfin Tetras prefer a slightly acidic to neutral pH level between 6.0-7.5. It’s important to test the water regularly and make adjustments as necessary.

I use a pH testing kit to ensure that the water in my tank stays within the appropriate range.

Water Hardness

Bloodfin Tetras prefer soft to moderately hard water, with a recommended range of 5-12 dGH. I use a water hardness testing kit to monitor the hardness level in my tank, and make adjustments as necessary.

Water Changes

Regular water changes are important for maintaining good water quality in your tank. I recommend changing 20-30% of the water in your tank every 1-2 weeks.

This helps to remove excess waste and toxins, and replenish essential minerals and nutrients. I use a siphon to remove the water and a bucket to collect it, and then refill the tank with fresh, treated water.

Overall, maintaining proper water parameters is essential for the health and well-being of your Bloodfin Tetras.

By monitoring and adjusting the temperature, pH, and hardness levels, and performing regular water changes, you can help ensure a healthy and thriving aquarium environment for your fish.

Personally, I have found that keeping a close eye on the water parameters has helped me to keep my Bloodfin Tetras healthy and happy.

By following these guidelines, I have been able to create a beautiful and thriving aquarium that I enjoy watching every day.

Good Tank Mates for Bloodfin Tetras

When it comes to choosing tank mates for your Bloodfin Tetras, it is important to consider their peaceful nature.

They are a schooling fish, so it is best to keep them in groups of six or more. Here are some good tank mates for Bloodfin Tetras:

1. Corydoras Catfish: These catfish are peaceful and spend most of their time at the bottom of the tank. They are great cleaners and will help keep the tank free of debris.

2. Neon Tetras: Neon Tetras are also peaceful fish and will get along well with Bloodfin Tetras. They are also great for adding some color to your tank.

3. Guppies: Guppies are another peaceful fish that will get along well with Bloodfin Tetras. They come in a variety of colors and are easy to care for.

4. Cherry Barbs: Cherry Barbs are a bit more active than Bloodfin Tetras, but they are still peaceful and will get along well with them. They are also great for adding some color to your tank.

5. Otocinclus Catfish: Otocinclus Catfish are great for keeping the tank clean. They are peaceful and will get along well with Bloodfin Tetras. Personally, I have had success keeping Bloodfin Tetras with Neon Tetras and Corydoras Catfish. They all get along well and create a peaceful and colorful environment in my tank.

Bloodfin Tetra Tank Mates: How Many Bloodfin Tetras Can Be Kept Together?

When it comes to keeping Bloodfin Tetras, one of the most common questions I get is how many of them can be kept together in one tank.

Bloodfin Tetras are schooling fish, which means they thrive in groups of six or more. However, the exact number of Bloodfin Tetras that can be kept together depends on the size of your tank.

As a general rule, you should have at least a 20-gallon tank for a group of six Bloodfin Tetras. This will give them enough space to swim around comfortably without feeling cramped. If you want to keep more than six Bloodfin Tetras, you will need to increase the size of your tank accordingly.

It’s important to note that Bloodfin Tetras are peaceful fish that get along well with other peaceful species.

However, they can become aggressive towards each other if they feel overcrowded or stressed. To prevent this from happening, make sure your tank is large enough to accommodate your Bloodfin Tetras comfortably.

When choosing tank mates for your Bloodfin Tetras, look for other peaceful species that enjoy similar water conditions. Some good options include Neon Tetras, Cherry Barbs, and Corydoras Catfish.

Avoid keeping your Bloodfin Tetras with aggressive or territorial fish, as this can lead to fights and stress for your fish.

In my personal experience, I have found that keeping a group of eight to ten Bloodfin Tetras in a 30-gallon tank works well.

They swim around together in a tight school, and their bright red fins really stand out against the greenery in the tank.

Just make sure you keep up with regular water changes and maintenance to keep your Bloodfin Tetras healthy and happy!

Feeding and Nutrition


As an owner of Bloodfin Tetras, I have found that they are not picky eaters and will eat almost anything. However, it is important to provide a balanced diet to keep them healthy and happy.

Bloodfin Tetras are omnivores and require a mix of both plant and animal-based foods. A good staple diet for them would be high-quality flake or pellet food that contains a mix of proteins and vegetables.

You can also supplement their diet with live or frozen foods such as brine shrimp, bloodworms, and daphnia.

Feeding Schedule

I have found that feeding Bloodfin Tetras twice a day works well for them. They have small stomachs, so it is important not to overfeed them.

Overfeeding can lead to health issues such as bloating and constipation. It is recommended to feed them small amounts of food that they can consume within 2-3 minutes.

You can also try feeding them at different times of the day to keep them active and engaged. It is also important to note that Bloodfin Tetras are schooling fish and should be fed in a group.

This helps to reduce competition for food and ensures that all fish receive a balanced diet. In conclusion, feeding and nutrition play a vital role in the health and well-being of Bloodfin Tetras.

Providing a balanced diet and feeding them in a group will help to keep them healthy, happy, and active.

Health and Disease

Common Health Issues

As with any fish, Bloodfin Tetras are susceptible to a variety of health issues. One of the most common issues is Ich, which is a parasitic infection that causes white spots on the fish’s body.

Another issue is fin rot, which is caused by bacteria and can result in the deterioration of the fish’s fins.

I have personally dealt with both of these issues in my own Bloodfin Tetra tank. It’s important to keep a close eye on your fish and monitor their behavior and appearance regularly to catch any health issues early on.

Preventive Measures

The best way to prevent health issues in your Bloodfin Tetra tank is to maintain good water quality.

This means performing regular water changes, keeping the tank clean, and monitoring the pH and temperature levels.

It’s also important to avoid overcrowding the tank and to provide plenty of hiding places for the fish.

Another preventive measure is to quarantine any new fish before introducing them to the tank. This can help prevent the spread of diseases and parasites to your existing fish.

Treatment Options

If you do notice any health issues in your Bloodfin Tetra tank, it’s important to take action quickly.

For Ich, there are several over-the-counter treatments available at pet stores that can be effective. For fin rot, antibiotics may be necessary to treat the bacterial infection.

It’s important to follow the instructions on any medication carefully and to monitor your fish closely during and after treatment. If you’re unsure about how to treat a particular health issue, consult with a veterinarian or an experienced fish keeper.

Signs of a Healthy Bloodfin Tetras

As a fish owner, it’s important to know the signs of a healthy bloodfin tetra. Here are a few things to look out for:

  • Active swimming: A healthy bloodfin tetra will swim actively around the tank.
  • Bright color: Bloodfin tetras have a distinctive red coloration on their fins. A healthy fish will have bright and vibrant colors.
  • Clear eyes: The eyes should be clear and free from any cloudiness or swelling.
  • Healthy fins: The fins should be intact and not torn or frayed.
  • Good appetite: A healthy bloodfin tetra will have a good appetite and eagerly eat when fed.

It’s important to keep a close eye on your bloodfin tetras and check for any signs of illness or disease. If you notice any changes in behavior or appearance, it’s important to take action quickly to prevent the spread of illness to other fish in the tank.

Personally, I always make sure to observe my bloodfin tetras closely during feeding time. A healthy fish will actively swim to the surface and eagerly eat the food. If I notice any fish that are not eating or seem lethargic, I take action immediately to address the issue. It’s important to be proactive in caring for your fish to ensure their health and well-being.

Signs of a Sick Bloodfin Tetra

As a fish owner, it’s important to keep an eye on your bloodfin tetras to ensure they are healthy and happy. Here are some signs that your bloodfin tetra may be sick:

  • Loss of appetite
  • Weight loss
  • Lethargy or inactivity
  • Erratic swimming patterns
  • Abnormal breathing or gasping at the surface of the water
  • Discoloration or spots on the body or fins
  • Swollen or bloated belly
  • Clamped fins or tail

If you notice any of these symptoms, it’s important to take action quickly to help your fish recover.

One thing to keep in mind is that some of these symptoms may also be signs of stress, so it’s important to evaluate the overall environment of your aquarium to ensure it is meeting the needs of your fish.

When I first started keeping bloodfin tetras, I noticed that one of my fish was swimming erratically and seemed to be struggling to stay upright.

After doing some research, I realized that this was a sign of swim bladder disease, which can be caused by overfeeding or poor water quality.

I immediately adjusted my feeding schedule and did a water change, and within a few days, my fish was back to swimming normally.

Remember, the key to keeping your bloodfin tetras healthy is to be observant and proactive in addressing any issues that arise. By taking quick action and providing the right care, you can help your fish live a long and happy life.


Breeding Setup

When I first decided to breed Bloodfin Tetras, I was worried about creating the perfect breeding setup. However, after some research, I found that these fish are relatively easy to breed.

The first step is to create a separate breeding tank with a sponge filter and plenty of plants. The sponge filter will provide gentle filtration without sucking up any eggs or fry, while the plants will give the fish a place to lay their eggs.

I recommend using a 10-gallon tank for breeding, as this will provide enough space for the fish to swim and breed comfortably.

Spawning Process

Once the breeding tank is set up, it’s time to introduce the male and female Bloodfin Tetras. I suggest using a ratio of two females to one male to increase the chances of successful breeding.

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

It’s important to remove the adult fish from the breeding tank once the eggs are laid, as they will eat the eggs and fry. The eggs will hatch in about 24 to 36 hours, and the fry will be free-swimming after about five days.

Fry Care

Once the fry are free-swimming, it’s important to feed them small amounts of food several times a day. I recommend using a high-quality fry food or crushed flakes.

The fry will grow quickly, and after about a month, they will be large enough to be moved to a larger tank with other fish.

It’s important to note that not all of the fry will survive, and it’s normal to lose some during the breeding process. However, with proper care and attention, you can successfully breed and raise healthy Bloodfin Tetras.

Product recommendations for bloodfin tetras:

  1. TetraMin Plus Tropical Flakes: This premium fish food is specifically formulated for tropical fish like bloodfin tetras, providing a balanced diet that promotes health and vitality.
  2. Seachem Prime: This water conditioner is essential for maintaining a healthy aquatic environment for bloodfin tetras. It detoxifies ammonia, nitrite, and nitrate, and also provides essential electrolytes and vitamins.
  3. Fluval Spec III Aquarium Kit: This compact aquarium kit is perfect for keeping a small school of bloodfin tetras. It includes a powerful filtration system and LED lighting to ensure optimal conditions for your fish.
  4. API Freshwater Master Test Kit: This comprehensive test kit allows you to monitor the water quality in your bloodfin tetra aquarium, ensuring that the pH, ammonia, nitrite, and nitrate levels are within safe ranges.
  5. Hikari Freeze Dried Bloodworms: Bloodfin tetras love bloodworms, and these freeze-dried worms are a convenient and nutritious treat that can be fed as a supplement to their regular diet.
  6. Fluval Edge Aquarium Gravel Cleaner: This easy-to-use gravel cleaner makes maintaining your bloodfin tetra aquarium a breeze. It removes debris and waste from the substrate without disturbing your fish.
  7. Aqueon QuietFlow LED PRO Aquarium Power Filters: This high-performance filter is designed to keep your bloodfin tetra aquarium clean and healthy. It features a five-stage filtration system and LED lighting for added convenience.
  8. Marina Floating Thermometer with Suction Cup: This reliable thermometer ensures that the water temperature in your bloodfin tetra aquarium is within the ideal range. Its floating design makes it easy to read and adjust.
  9. Marina Tank Scraper: This versatile tool allows you to clean the glass, remove algae, and scrape the substrate in your bloodfin tetra aquarium. Its ergonomic design makes it comfortable to use.
  10. Zoo Med Aquatic BettaMatic Automatic Daily Betta Feeder: This automatic fish feeder is perfect for busy fish owners who want to ensure that their bloodfin tetras are fed on a regular schedule. It dispenses food automatically and can be programmed to feed up to three times per day.


Overall, taking care of Bloodfin Tetras has been a rewarding experience for me. While they may require a bit of extra attention and care, the effort is well worth it for the beauty and joy they bring to your aquarium.

Remember to keep their water clean and well-maintained, and to provide them with a varied and balanced diet. With a little patience and dedication, your Bloodfin Tetras will thrive and flourish.

One thing I’ve learned from my own experience is the importance of observing your fish and their behavior. By paying close attention to their movements and interactions, you can often detect early signs of illness or stress and take action before it becomes a serious problem.

In conclusion, Bloodfin Tetras are a wonderful addition to any aquarium, and with proper care, they can live long and healthy lives. I hope this guide has been helpful in providing you with the information you need to create a happy and healthy environment for your fish.


As I have mentioned earlier, Bloodfin Tetras are a relatively easy fish to care for. However, there are still some questions that are frequently asked about their care. Here are some of the most common FAQs:

Q: What is the ideal water temperature for Bloodfin Tetras?

A: Bloodfin Tetras are tropical fish and thrive in water temperatures between 72 and 78°F. It is important to keep the temperature consistent as sudden changes can cause stress and illness.

Q: How often should I feed my Bloodfin Tetras?

A: Bloodfin Tetras are omnivores and should be fed a varied diet of high-quality flakes, pellets, frozen or live food. It is recommended to feed them twice a day, only what they can consume in 2-3 minutes. Overfeeding can lead to health problems and poor water quality.

Q: Can Bloodfin Tetras live with other fish?

A: Yes, Bloodfin Tetras are peaceful fish and can live with other peaceful species that have similar water requirements. However, avoid keeping them with aggressive or fin-nipping fish as they can become stressed and their fins can be damaged.

Q: Do Bloodfin Tetras need a filter?

A: Yes, a filter is necessary to maintain good water quality and to remove harmful toxins. A filter should be chosen based on the size of the aquarium and the number of fish. It is recommended to do a partial water change of 25% every two weeks to maintain optimal water quality.

Overall, Bloodfin Tetras are a great addition to any community aquarium. With proper care and attention, they can live up to 5 years and bring joy to any fish enthusiast.

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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