It is normal for the turtle to have black spots on its back, so don't worry too much. If there is something white on the turtle's back, it may be infected with mold, which needs to be cleaned up in time. At the same time, pay attention to changing water and water environment, so as to avoid mold continuing to breed. If the edge of turtle's back is tilted, it may be due to long-term dehydration, or it may need to change its armor, so it is necessary to pay attention to cleaning and add a little calcium to it to promote its growth.

1. Raise the temperature: The first advantage of basking in their backs is to raise the temperature. As a temperature-changing animal, the activities of tortoises are often closely related to temperature. If the temperature is relatively low, tortoises are not very active. On the contrary, after the temperature rises, its metabolism will accelerate, and it will love activities more.

2. Eliminate bacteria: Because sunlight contains ultraviolet rays, it still has a good killing effect on some bacteria, especially for turtles soaked in water for a long time, it is easy to have various fungi on their backs, which can be completely eliminated by basking in the sun, thus preventing various diseases.

3. Absorption of calcium: It can also promote the absorption of calcium by basking in the back. Although basking in the sun can not supplement calcium, it can promote the synthesis of vitamin D3, which is of great help to the absorption of calcium, help its bone growth, and prevent soft nail disease and other diseases.