Insist on changing water for dragon fish every week. When changing water, we need to pay attention to the need to raise water in advance, and adjust the temperature, pH value and other standards of the new water to be consistent with the old water, in line with the standard of longfish survival. It is not suitable to replace all the water every week. Only 20% - 30% of the water can be replaced each time.
Introduction to black belt
The origin of the black belt (Dragon) is the Negro River Basin in South America. The name of the river, in Spanish, means "black river". As we all know, the black belt is the product of the black river. The name of the black belt is indirectly related to the river name. Because of the special growing environment, the baby of the Black Belt will wear the black protective clothing. This black protective color is the main color If it is not easy for other predators to find the larvae in this river, it is a successful evolution of organisms in terms of survival rate. Compared with the silver belt of the same close relatives in South America, there seems to be little difference in appearance, but there are still considerable differences in fact. Therefore, in biological classification, they belong to two species of the same genus, the same species and different lines. The production season of black belt is spring every year.
The body length is the same as that of silver band, and the maximum body length can reach 120cm. The protective color of the baby of the Black Belt will gradually fade after about 18 cm, and the color of the adult body will become quite similar to that of the silver belt.
How to raise black belt?
Raising dragon fish can tell whether they are healthy from the shining scales of dragon fish. Scientific feeding methods and lighting help them to get natural light are also very important feeding points in dragon fish feeding. Xiaobian will introduce some feeding methods for you.
The research shows that the color of the hair of the dragon fish is played by the pigment cells (chromogenic cells) in the dermis under the scales of the fish and the most surface guanosine. There are many kinds of cells scattered in the dermis, which can stretch and contract with the change of light intensity or environment. All kinds of pigment cells have the function of absorbing and reflecting light wavelength. Therefore, in different light environment, they will show different colors.
In addition, in different light intensity environment, the color of dragon fish will also change. For example, if a dragonfish is in a strong light environment, the pigment cells will expand. When the pigment cells expand, the pigment will expand with the radiation around the cells, the area of the pigment cells will expand, and the color will deepen significantly. Where there are many red pigments, the color will be darker and redder.
On the contrary, if the colouring cell shrinks, the colouring cell shrinks, the colouring molecule shrinks, and the colouring will fade obviously. At the same time, the pigment will concentrate with the contraction of cells, sometimes even shrink into tiny spots, and its color will naturally become light or not obvious.
First, insist on changing water for the dragon fish every week. When changing water, we need to pay attention to the need to raise water in advance, and adjust the temperature, pH value and other standards of the new water to be consistent with the old water, in line with the standard of longfish survival. It is not suitable to replace all the water every week. 20%-30% of the water can be replaced every time. When changing water, we should first draw out the old water, and then slowly inject new water along the wall of the fish tank.
Second, the dragon fish needs to be taken care of. It's best to choose a suitable lamp stick to keep the dragon fish, and give the dragon fish 6-8 hours of light every day. It is worth noting that the best light of the dragon fish is the daylight during the day. If you use the light for a long time, it will darken the back of the dragon fish. So, if there is any condition, we should let the dragon fish bask in the sun more.
Finally, we should give the dragon fish food regularly and quantitatively. Feeding dragon fish should also be based on its actual situation to choose the right food. To put it simply, the juveniles should choose some small bread worms, blood worms and other foods when choosing food. When they grow up, they can eat meat, shrimp and other foods. Of course, when choosing food, we should also pay attention to diversification. Professional bait and live bait are organically matched to meet the needs of the growth and diet of longfish.