Neon Tetra

This elegant miniature fish reaches a length of no more than 4 cm. Its appearance resembles the Cardinal Tetra due to the characteristic stripes on its body. A distinctive feature of the Neon Tetra is the blue stripe running along its entire body, while the red stripe is interrupted in the middle of the torso. In addition, this species is smaller in size.

The differences between the male and female are minor and are mainly manifested in the pattern. The male appears slimmer and has a straight blue line, while in the female, this line has a curved shape.

In their natural habitat, these fish are found in South America, preferring slow-moving rivers and streams that flow under the dense canopy of tropical forests. As a result, sunlight barely reaches the water's surface. Neons choose shallow and mid-water levels, and their diet consists of worms and small crustaceans. It is important to note that all fish sold in retail today are the result of artificial breeding, with the majority of supplies coming from Eastern Europe and the Far East.

Neons coexist well with most peaceful small fish, but they should not be kept with large or aggressive species. They should be kept in schools of at least 6–8 individuals, as in single or paired keeping, the fish lose vitality and color intensity, which significantly shortens their lifespan.

Providing suitable conditions for Neons is quite simple but requires attention to detail: soft and acidic water is necessary, as well as an effective filtration system. The optimal solution would be to use a canister filter, which does not create excessive water movement and effectively cleans it. Since the fish are miniature, it is important to secure the water intake points to prevent them from being sucked into the system; for example, sponge pre-filters can be used. For acidifying the water, peat is recommended as a filter material. Among other necessary equipment, an aerator, heater, and a low-power lighting system should be mentioned, as Neons are sensitive to bright light. In aquarium decoration, preference is given to dense plantings of plants, arranged in thick groups along the side and back walls. The presence of several floating plants is also welcome. The substrate should preferably be dark, sandy, with elements of shelters in the form of snags or intertwined roots. A few dry leaves can be added to the bottom; they will give the water a light brown tint, mimicking the natural habitat. Leaves should be replaced every two weeks.

They readily accept all types of dry commercial foods, but it is desirable that the food be finely crushed, as due to their small size, the fish are unable to cope with large particles. Live foods such as daphnia, bloodworms, and others are excellent as an additional diet.

Breeding Neons at home presents certain difficulties; in addition to creating the necessary conditions, pair compatibility is also required. While creating suitable conditions is quite realistic, finding the ideal female and male often resembles a lottery.

In a clean and healthy aquarium, diseases are generally not a problem for Neons. The main causes of ailments are usually deteriorating keeping conditions or contact with already sick fish. More detailed information on symptoms and treatment methods is available in the “Aquarium Fish Diseases” section.

When purchasing, choose active, mobile individuals that stay in a school and do not show signs of lethargy or a desire to isolate themselves. Carefully examine the fish's body: there should be no whitish spots, ulcers, scale damage, or spinal deformities, as these symptoms may indicate the dangerous Neon Tetra disease (Plistophorosis). Avoid purchasing fish from aquariums where dead or visibly sick specimens have been noticed, as infections spread quickly in a group. A healthy individual has a bright, rich coloration without signs of dullness in the neon stripe.