Guide to Temperature Control for Betta Fish Tanks
(Applicable to common species such as Chinese Betta and Thai Betta)
1. Chinese Betta
Optimal Temperature: 22–28°C (Round-tailed Betta has stronger cold tolerance; Fork-tailed Betta prefers slightly higher temperatures).
Breeding Period: Temperature needs to be raised to 26–28°C.
Winter Care: If the temperature drops below 20°C, a heater is required to avoid excessive day-night temperature fluctuations.
2. Thai Betta
Optimal Temperature: 24–28°C (must not be lower than 22°C).
Breeding Period: Temperature must be stabilized at 28°C.
Equipment Recommendation: A heater is mandatory to prevent sudden temperature changes.
3. Key Precautions
Thermometer: An essential tool. Electronic digital thermometers (with an error margin of ±0.5°C or less) are recommended.
Water Change Tip: The temperature of new water must match the original tank water (temperature difference ≤ 2°C).
Abnormal Behaviors:
Low water temperature: Sluggish swimming, loss of appetite.
High water temperature: Rapid breathing, "fin burn" (white edges on fins).
4. Frequently Asked Questions (FAQs)
Q: What if I don’t have a heater?
A: In winter, you can use a heat-retaining lamp or a foam box for temporary insulation, but long-term use still requires heating equipment.
Q: Can bettas adapt to low temperatures?
A: They can tolerate temperatures as low as 18°C for a short period, but prolonged low temperatures easily lead to weakened immunity.