African Tetra

Adults can reach up to 10 cm in length. Their body is somewhat elongated, covered with large scales. A distinctive feature is a broad, light horizontal line running along the center of the body. Above this line, the coloration takes on a gray hue, while below it becomes yellowish with a noticeable blue sheen. Particular attention is drawn to the red pigment located in the upper part of the eye. As a rule, males are distinguished by brighter and more saturated coloration compared to females.

Although this species has gained widespread recognition in aquaristics, it is quite rare in the wild. The species is endemic to Nigeria and occurs in two river systems — the Ogun and the lower Niger. It is known from fewer than ten localities, all lying in an area where deforestation and pollution continue unchecked. Unfortunately, the degradation of these areas due to human activities such as pollution and deforestation has significantly reduced populations.

A peaceful, schooling, and extremely active fish. For this reason, it should not be kept with timid and sedentary species. It coexists well with Synodontis catfish, Parrot Cichlids, Kribensis, and other African tetras, provided they are similar in size and temperament.

These active fish will require an aquarium of at least 150 liters. For decoration, it is recommended to use sand or fine gravel, supplemented with several large, smooth stones. Various snags, both natural and decorative, and sturdy, resilient plants are also suitable. It is important to arrange all decorations compactly, mainly along the side and back walls, to leave enough free swimming space. Using a filter with alder cone filler will help recreate the water conditions characteristic of its natural habitat. Hydrochemical water parameters should be maintained at a slightly acidic pH with low to medium hardness (dGH). Aquarium maintenance includes regular cleaning of the substrate from organic food debris and excrement, as well as weekly water changes of 15–20% of the volume with fresh water.

These fish are quite undemanding in terms of diet and readily accept all types of food: dry, frozen, or live. A varied menu contributes to the development of their best coloration. Conversely, a poor and monotonous diet, for example, consisting of a single type of food, will negatively affect the vibrancy of their natural hues.

Under favorable conditions, there is a high chance of fry appearing even in a community tank. However, to protect them from being eaten, it is necessary to promptly rehouse the young. If targeted breeding is planned, it is recommended to prepare a separate spawning tank. Its setup can be very simple, sometimes even without any decorations. To protect the eggs and then the fry, the bottom should be covered with a fine-mesh net or a thick layer of small-leaved, undemanding plants or mosses. Lighting should be subdued. Equipment-wise, a heater and a simple air-lift filter are sufficient. A smooth change in water conditions (slightly acidic, soft water) and the inclusion of a large amount of protein-rich foods in the diet serve as a stimulus for spawning. In other words, the diet of the African Red-Eyed Tetra should primarily consist of live and frozen food. After some time, the females' abdomens will noticeably round out, and the males' coloration will become more intense – this indicates the beginning of the breeding period. Several females are first transferred to the spawning tank, and the next day, the largest and brightest male is added. The completion of spawning is indicated by significantly 'thinner' females and the presence of eggs among the plants or under the net. After this, the fish are returned to the community tank. Fry hatch within 24 hours and begin actively swimming in search of food on days 2–3. They should be fed specialized micro-foods. They grow very quickly, reaching almost 5 cm in length in just seven weeks.

The best defense against any disease is a balanced aquarium biosystem with suitable keeping conditions. Therefore, if a fish's behavior has changed, its color has altered, unusual spots or other symptoms have appeared, the first step should be to check the water parameters. Only after that can treatment begin.

When choosing individuals, pay attention to their activity and the condition of their skin. Healthy fish should be active, without visible damage, ulcers, plaque, or signs of emaciation. Avoid purchasing fish that appear lethargic, stay near the water surface, or have clamped fins, as this may indicate stress or the presence of diseases. Since the species is schooling, it is recommended to acquire a group of 6–10 individuals at once to ensure comfortable adaptation in the new aquarium.