According to comprehensive research data, the key points for controlling the optimal water temperature for betta fish are as follows:
I. Core Temperature Range
- Golden Range: 24-28°C is the most suitable interval, during which metabolism is active, body color is vibrant, and immunity is strong.
- Precise Recommendations:
- Chinese betta fish: 24-27°C (slight differences between fork-tailed and round-tailed varieties).
- Thai betta fish: 22-24°C (slightly weaker low-temperature tolerance).
- Maintain a constant temperature of 26°C during the breeding period.
II. Performance of Temperature Impact
- Below 20°C: Sluggish activity, prone to causing water mold disease.
- 24-26°C: Vigorous feeding, with a lifespan of over 3 years.
- Above 28°C: Rapid breathing, accelerating water quality deterioration.
III. Seasonal Management Suggestions
- Winter: A heater must be used to keep the water temperature ≥20°C (Chinese betta fish can briefly tolerate 16°C).
- Summer: Avoid direct sunlight and use a fan to cool the water below 28°C.
- Day-night temperature difference: Control within ±2°C.
IV. Special Precautions
- New fish entering the tank need to acclimate slowly (adjust 1-2°C per hour).
- Place the thermometer away from the heater for detection.
- Coordinate control with pH value (6.5-7.2 is optimal).