The temperature for raising tropical fish should be controlled between 20 and 30 ℃, and it is best to keep it at about 25 ℃. There are some species that can tolerate low temperatures, such as guppies, which can tolerate low temperatures of 16 degrees Celsius, but the health of fish will also be affected if they continue to stay at this temperature. Keeping the water temperature at 25 C can also prevent many diseases, such as white spot disease and water mildew disease, which are easy to suffer from when the temperature is low.
1. Dry in advance: Tap water is usually used to change water for tropical fish. Because the water contains residual chlorine, it is necessary to dry in advance so that the residual chlorine can dissipate, so that there will be no problem with fish farming. Usually, it takes only one day to dry water in summer, two days in spring and autumn, and three days in winter when the temperature is low.
2. Frequency of water change: The frequency of water change mainly depends on the maintenance of water quality. If there is a filter in the fish tank, the water body is not easy to deteriorate. In this way, it is OK to change it once every half month. If the water quality is not good, it should be changed once a week. Do not change more water each time, change one fifth to one quarter.
3. Precautions: The tropical fish must pay attention to the water temperature when changing the water. The temperature difference between the new water and the old water should not be too large, and the water should not be changed by violence. Otherwise, the water quality will fluctuate, which is harmful to the health of the fish.
