The optimal water temperature for Chinese betta fish (such as Macropodus opercularis and Macropodus ocellatus) ranges from 22-28℃, with 25-28℃ being the ideal range for their growth. Specific considerations vary by species and season, as outlined below:
1. Temperature Ranges
Daily Care: 22-28℃ (Optimal: 25-28℃)
Breeding Period: 26-28℃ (to stimulate spawning)
Cold Tolerance: Can withstand 15℃ for short periods, but prolonged exposure below 20℃ increases susceptibility to disease.
2. Effects of Temperature
Below 20℃: Decreased appetite and reduced activity.
Below 15℃: High risk of fungal infections (such as Saprolegniasis) and Ichthyophthiriasis (White Spot Disease).
Above 30℃: Diminished dissolved oxygen levels, potentially leading to tail burns or fish jumping out of the tank.
3. Seasonal Management
Summer: Avoid direct sunlight. If water temperature exceeds 28℃, cool it down using methods like fans or partial water changes.
Winter: It is recommended to use a heater to maintain the temperature between 22-24℃ and prevent drastic temperature fluctuations.
4. Key Notes
The temperature difference between new and old water should not exceed 2℃ during water changes.
Avoid sudden temperature changes (e.g., direct exposure to air conditioning drafts).
For more detailed information on water quality management (such as pH levels and water hardness), additional explanations can be provided upon request.