The hatching time of betta fish eggs is affected by factors such as water temperature and water quality, usually ranging from 24 to 48 hours. Details are as follows:
1. Hatching Time Range
Routine Conditions
When the water temperature is stably maintained at 26-28°C, fertilized eggs will hatch in approximately 24-36 hours.
If the water temperature is low (e.g., below 24°C), the hatching time may be extended to 48 hours.
Special Cases
Records show that under optimal conditions (water temperature 28°C, pH 6.5-7.0), the hatching time can be shortened to as little as 20 hours.
2. Key Hatching Factors
Water Temperature Control
For every 1°C increase in water temperature, the hatching speed increases by approximately 10%. However, temperatures exceeding 30°C may cause egg deformities.
Male Fish's Egg-Guarding Behavior
Male bettas will continuously repair the bubble nest and fan water to supply oxygen. Human interference may lead to hatching failure.
3. Post-Hatching Management
Fry Status
Newly hatched fry need to attach to the bubble nest for 2-3 days and will only swim freely after absorbing the yolk sac completely.
Separating Parent Fish
Once the fry are able to swim, the male fish must be removed immediately to prevent it from attacking the fry or contaminating the water quality.