For safe breeding and protection of offspring from parents and other aquarium inhabitants, it is recommended to use a separate spawning tank. A small aquarium of about 10 liters will be suitable for spawning. Equipment needs are minimal: a simple sponge air filter, a heater, and a light fixture for illumination. A few large plants can be used for decoration, but substrate is not recommended to simplify future maintenance. A fine-mesh net can be placed on the bottom of the tank, allowing eggs to fall through it. This design is necessary to protect the eggs, as parents are prone to eating their offspring. The chosen pair of adult fish is placed in the spawning aquarium. The following conditions stimulate breeding: maintaining water temperature in the range of 21–24°C, a slightly acidic pH level (6.0–6.5), and including meaty live or frozen foods in the daily diet. It is important to regularly clean the substrate of food remnants and organic waste (excrement), as water quickly becomes polluted in a confined space. The female lays eggs in batches of 10–20 daily for two weeks. Each batch of eggs should be carefully removed from the spawning aquarium (which is why substrate is not used) and transferred to a separate container, such as a tray with high sides, where the water depth is only 1–2 cm. 1–3 drops of methylene blue are added to the water, depending on the volume, to prevent the development of fungal infections. A dark and warm place must be provided for the tray, as the eggs are extremely sensitive to light. The incubation period lasts approximately 12 days. An alternative method is to place the eggs in moist or even wet peat at the same temperature and in complete darkness. In this case, the incubation period increases to 18 days. Fry also do not hatch all at once, but in batches; newly hatched fry are transferred to the spawning aquarium, where the parents should no longer be present by this time. The first food, consisting of microscopic organisms such as artemia nauplii and paramecia, can be given after two days. From the second week of life, the fry are switched to live or frozen foods such as artemia, daphnia, and others. Great attention must be paid to water cleanliness, as during the spawning period. In the absence of an effective filtration system, the spawning aquarium should be cleaned regularly, at least every few days, and a portion of the water replaced with fresh.