Blue tetra fish: Care, Tank Mates, Breeding & More

blue tetra

The blue tetra fish has interesting peculiarities that make it a favourite of many people and not require special care or attention since it is strong and can survive on its own. Its adipose fin is located between the tail fin and the dorsal fin, and its teeth are sharp so it can easily digest its food and it belongs to the characin family, so it is not a good swimmer.

Scientific NameBoehlkea fredcochui
Other NamesBlue King Tetra, cochu’s blue tetra
FamilyCharacidae
GenusBoehlkea
OriginsSouth America
TemperamentPeaceful
Aquarium LevelAll Levels
DifficultyBeginner
ShoalingYes
Best kept asGroups 6+
DietOmnivore
ReproductionEgg-Scatterer
Lifespan2 – 3 years
Maximum Sizeup to 5.5 cm

General habitat

In its natural habitat this species can grow up to 4 centimetres in length; in addition, there is no difference between the females and the males. Regardless of the sex they have, they all have a flattened body, their colour is intensely blue, and they have a small fattening at the level of the abdomen like the rest of the tetras. Above it has a dark stripe that runs from the tail fin and ends in the stomach.

Blue tetra fish are native to South America and Peru, so they can be found in basins and rivers such as the Negro or Orinoco. They are used to living in water currents between 22 and 27 degrees Celsius, although sometimes they can adapt in a wide range of 5 to 8, it is advisable to keep them at a pH of 6 to 7.5 together with a GH less than 15 D.

Without a doubt, we are talking about one of the best-known species within the so-called Congo tetras or African tetras. They have the peculiarity of being shoals, so they are peaceful and social that can live with specimens between 6 to 8 to avoid feeling stressed. It should be taken into account that the genus is vulnerable to poor quality waters or nitrites.

Blue tetra overview

The blue tetra fish can be compatible with another species of the school of small characins; the advantage is that they can relate perfectly to cichlids such as discus fish. They can also easily adapt to other invertebrate animals such as shrimp or snail. They do not bother at all, so it is recommended for beginners of this hobby.

Aquariums for blue tetra fish

To ensure that the development of blue tetra fish is adequate, it is important to have a good aquarium. This means that you have a good water filter, with vegetable plantation to filter the light and excellent oxygenation to feel happy inside their new home. Due to their physical features, they are used to living in crystallized and coloured environments, which is why they do not resist sudden changes in water.

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Fish tanks for blue tetra fish

Because they have a calm behaviour, blue tetra fish can live with up to 6 specimens in the same aquarium, so you must make sure that it is large and better if it is around one, since it does not have corners with which the species can be injured. In addition, the water must have a moderate temperature to prevent them from getting sick, and the currents must be somewhat slow since they are not as good swimmers.

The aquarium or fish tank you choose should have a minimum of 60 litres to prevent the fish from feeling stressed. Natural vegetation can be planted on the sides and at the bottom to leave the area in front free, in this way the blue tetra fish can swim lightly when it likes. The lighting should not be very powerful because when there is too much light, it can damage the sight.

What you can do so that it does not filter so much light in the aquarium is to use a substrate and gravel of dark tonality so that they can rest and feel safe. It is recommended that the water temperature does not exceed 27 degrees Celsius for its slim body. With these basic cares, your species will always stay away from diseases, and its colour will remain robust.

Aquarium elements

The advantage of the blue tetra fish is that it adapts to a high range of water, so it is necessary to have it at a pH of 6-7’5 together with a hardness of 15 dGH maximum. As for the elements, as we mentioned previously, it must have a lot of planting on the sides, leaving the centre free to speed up its swimming and so that they cannot collide with anything.

Types of blue tetra fish

The name also knows the blue tetra fish of Boehlkea fredcochui, a species that is currently in high demand for its physical peculiarities. Because it is a kind of calm and social behaviour, it is suitable to live with other similar genders since it does not bother, much less does it like to have confrontations. It is ideal for decorating community aquariums.

Types of blue tetra fish

Now you can buy specimens of the same family, but with different characteristics and colour, this is due to the combination that has occurred between the tetra fish. The only coincidence is that everyone is used to living in small groups so as not to stress and not to feel alone all the time. Among the most common are the following:

Bleeding-finned petra fish: As the name implies, this species has the fins completely dyed a deep red colour as if it were always bleeding. Its body is thin and has a strong greenish hue; sometimes, it can be transparent or white. They can live between 5 to 8 years, depending on the care that is given.

Black tetra fish or monjita: it is a beautiful species thanks to its physical appearance and striking colour. It is characterized by having two black stripes on the body, has fins covered in black and has a large anal fin for efficient swimming. Being an omnivorous animal, it adapts easily to any supply.

Red tetra fish: it is originally from the characid family, in a community aquarium it can measure between four to five centimetres in length. However, its head is usually larger than its body, and its upper jaw is not as developed as the lower jaw.

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Caring for your species

Because they have a small appearance, they require a wide area so they can swim as they please. The blue tetra fish, like its other family, are used to living in wooded areas, so it would be a good idea to surround the aquarium with artificial or natural plants, but first, you should advise yourself that they are not pointed or heavy.

Baby blue tetra fish

For the reproduction of blue tetra fish to be successful, they must be given the necessary conditions so that they survive during their first days. Being a descendant of the characid family, they are very easy to breed, however before laying a large aquarium is required to allow safe development and swimming. Otherwise, the couple may feel stressed to the point of not wanting to fertilize eggs.

Reproduction of the blue tetra

It is important that the aquarium has a lot of floating vegetation, preferably natural, in some cases the male is in charge of looking for his nest so that when the moment of reproduction arrives, he can place the eggs on it. In this way, it marches territory and prevents other species from eating them, so the greatest possible care must be taken.

Courtship begins when the male chases the female almost all the time until he stalks her, then kicks her in the belly to achieve fertilization. After the act, the female performs the laying in the previously prepared nest. The most convenient thing, in this case, is to remove them and place them in another aquarium with very soft and relatively acidic water that does not exceed a pH of 6.7 so that they are born healthy.

Now we only have to wait between 35 to 48 hours for the blue tetra fish’s eggs to hatch, although the wait can vary depending on the water temperature. In the first three days of their birth, the little fish feed on their life sac to survive since they are so small they do not digest food correctly. On the fourth or fifth day, they begin to swim freely so it can be introduced with the other fish.

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Tips for breeding

After releasing their swim, it is necessary to provide them with live food as is done with the blue tetra fish. To start, you can give them a small portion of nauplius so that their defences are strengthened and for their immune system to develop properly. It is advisable to incorporate a good amount of java moss so that the baby has an appetite and grows faster.

Blue tetra fish feeding

The blue tetra fish is a beautiful and very striking species due to its greenish silver hue on the back and an electric blue hue that goes from the caudal areas to the gill area, which is why it always attracts attention. The abdomen exhibits a white and yellowish colouration. In order for them to always remain robust, it is important not only to give the water the necessary care but also to feed it correctly for further development.

What does the blue tetra fish eat?

Blue tetra fish have the peculiarity of being omnivores like other characins; this advantage allows them to give them any type of food without any inconvenience. Although they accept granule and flake foods, they sometimes prefer frozen live foods such as brine shrimp, crustaceans, shrimp, red mosquito larvae, stews, and small worms.

They can also be given a portion of fish meal to vary the diet as they can get bored with the routine. This species accepts practically all types of commercial food for omnivorous families within a community aquarium, so they never leave food remains in the water. It is recommended to feed them once or twice a day so that their small organism can digest it well.

When supplies are provided in more significant quantities, the only thing that is achieved is stuffing the fish, which can cause poor digestion and can even become sick. Therefore, you have to be careful when eating, it is also necessary to throw them at a small distance to prevent others from gaining an advantage, and it is left without feeding.

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How to feed them?

For the blue tetra fish to stay healthy and prevent it from getting sick from the food provided, the ideal is to give it its food in the morning and at night since at noon it keeps swimming or playing with the other fish. So that the products do not monopolize any harmful bacteria, it is necessary to verify that the tank is not dirty or mouldy since at the time of feeding the fish can seriously contaminate.

Blue tetra fish care

Blue tetra fishes are originally from the characid family, so they have a fusiform body. They have a fairly small adipose fin between the anal and caudal fin that contributes to stabilization while swimming the mouth is oriented towards the part of up. Their behaviour is peaceful so they can coexist with other genders with similar characteristics so that they feel protected and happy.

Basic care

Sometimes these fish are very restless, so it is necessary to keep them in a large aquarium with a lot of oxygenation. Otherwise, they can get stressed, which affects their immune system, they will also spend most of the day chasing each other, but they will not do any harm. To avoid this situation or so that they are not shy, it is recommended to place at least six copies.

Because the blue tetra fish is a school, it does not require special care or attention, the only thing that is required is that its diet is correct for its correct development. On the other hand, it is important to verify that it shares with fish of similar habitat habits so that there are no confrontations, but if you want it to be with slow-swimming species, it is important to have a fairly large aquarium.

In order to always have a robust colouration, it is important to clean the aquarium at least once a week to avoid the creation of pests or bacteria. The most advisable thing is to have a good water filter so that it remains crystallized since this is how these fish like to live. It is recommended for beginners starting with this hobby.

How to care for blue tetra fish

Depending on the care given to the blue tetra fish, this will be their years of life. Generally, they last between 5 to 6 years of life. For this reason, it is important that from a young age, they eat foods rich in proteins, minerals and vitamins to strengthen their defences. With these precise cares, your species will stay safe and sound from any disease, and you will not fail in the attempt.

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