Traffic light fish have strong adaptability and low requirements for water temperature, and they can live at water temperature between 20-26 ℃. But the most suitable temperature for their growth and development is 22-26 ℃. If breeders want them to develop better, it is best to keep the water temperature above 22 ℃. Because their appetite and activity are the best in this temperature range, their growth speed and state will be better.

Red and green fish belong to tropical fish. Although the acceptable temperature range is wide, it cannot accept too low water temperature. When the air temperature is low, it is best to use a heating rod to keep the water temperature above 20 ℃. In addition, we should pay attention to the temperature difference not too large to avoid stress reaction.

Traffic light fish like weak acidic soft water, and it is necessary to keep the PH value between 5.8 and 6.8 in artificial breeding. So that they can move normally. If the water quality is alkaline or hard, it will have a certain impact on their growth and development.

When raising traffic light fish, it is best to use tap water after exposure. Because tap water is chemically sterilized, it contains chlorine gas. Although it will not cause harm to human body, it will have a great impact on fish. Therefore, before use, it is best to expose yourself to the sun for 2-3 days.