Rosy barb

Aquarium fish: Rosy barb (Pethia conchonius)
Size: 9 – 12 cm
Origin: Asia
Water temperature: 16-24 ° C
Aquarium volume: 110 l

Rosy barb (Pethia conchonius) – fish from the carp family often found in aquariums. It is widely used as a test fish in a wide variety of laboratory studies.


It comes from Asia. Its natural place of occurrence is the waters of northern India – Bengal and Assam. The species lives mainly in rushing mountain streams.

Depending on the occurrence, it may differ in size and color.

Characteristics and disposition

In a natural environment, pink barb can reach up to 15 cm in length, but in an aquarium no more than 12 cm. Males are slightly smaller and slender than females, have black fins and an iridescent red body color, which is especially intense during the spawning season. Females are mostly yellowish, silvery and not very conspicuous. Difficult to distinguish sex in young fish .

There is also a bred variety of gold, neon or decorated with veil fins. These varieties are usually smaller. By their nature, shoal fish should be kept in groups of at least 8-10 individuals . In this amount, they are less skittish and look more effective. The species likes to gnaw on the delicate, soft leaves of some aquarium plants.

This can be counteracted by regularly feeding plant food.

Nutrition and feeding

They are omnivorous fish. In nature, they feed on worms, insects and other small invertebrates, plant and organic matter. In the aquarium, it is best to give good quality dry food, regularly supplemented with live and frozen foods such as Ochotka, Artemia, Dafnia and plant foods. Such a diet will keep the fish in good condition and beautiful coloration.


A spacious aquarium with a length of at least 100 cm is recommended. Rosy barbs will look best against the background of dense vegetation and dark ground. Light muffled by floating vegetation and twisted roots will give the tank a more natural look. They like a fairly strong flow of water. The species is generally mild and often recommended for general aquariums.

There are no special requirements to the chemical composition of the water. He feels best at a temperature of 18 – 22 ° C. It can stay in ponds from June to September. It can be combined with most popular aquarium fish, such as small tetras , tetras, viviparas, rainbow fish , gourami , catfish , loaches .


Like most carp, they are spawning fish and do not care for their offspring.

In well-kept aquariums, spawning often takes place without the intervention of the aquarist . However, if we want to raise a larger number of fry, a more controlled approach and preparation of a separate aquarium is required. The aquarium should not be too brightly lit. Cover its bottom with a net that will prevent the roe from being eaten. A mat made of artificial grass or glass balls can also be used for this purpose.

However, it is best to use fine-leaved plants or an aquarium mop. The water should be slightly acidic, pH 7.0 at 24 ° C. A sponge filter will ensure proper aeration and water movement. We feed the fish with live and frozen foods. When the females are thicker, choose 2 or one pair and in the evening transfer them to the previously prepared aquarium.

Spawning usually takes place in the morning of the next day. After the spawning is finished, the parents are removed from the aquarium, and half of the water must be replaced with fresh water of the same temperature. You can also add a few drops of methylene blue to the water. Hatching takes place after 24 – 48 hours, and after the next day the larvae begin to swim freely. They should be fed intensively, three or four times a day, with brine, copepod or small artificial food and regularly topped up with fresh water.

In the spacious tank, the fry grow very quickly.


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