The suitable water temperature for bettas should be adjusted based on their specific species and breeding environment. Below is a summary of key information:
1. Core Temperature Ranges
Chinese Betta
Optimal Water Temperature: 24–27°C (most suitable).
Tolerance Range: Can withstand low temperatures as low as 20°C and high temperatures up to approximately 30°C, but prolonged exposure to extreme temperatures may cause health issues.
Siamese Betta
The optimal water temperature is similar to the above, though some sources indicate a slightly broader adaptive range (e.g., 24–28°C).
2. Seasonal Adjustments
Summer: Avoid direct sunlight or high-temperature environments. Maintain stable water temperature by shading or using fans to cool down.
Winter: Use a heater to keep the water temperature within the 24–27°C range, and avoid temperature differences exceeding 2°C to prevent stress responses.
3. Daily Management Tips
Precise Temperature Control: Equip a thermometer and calibrate it regularly. When changing water, ensure the temperature difference between new and old water does not exceed 2°C.
Water Quality Support: Neutral water quality (pH 6.5–7.2) and adequate dissolved oxygen (≥5 mg/L) can enhance fish health.
Breeding Optimization: During breeding, stabilize the water temperature at around 28°C to promote egg hatching.
Summary: Bettas are sensitive to water temperature and need to be strictly maintained within the 24–27°C range to ensure vibrant coloration and robust vitality. If the environmental temperature fluctuates significantly, it is recommended to use a heater or temperature control equipment for assistance.