First, Assess the Situation:
* Is the male dead? If yes, remove the body immediately to prevent further aggression and potential disease spread.
* Is the female actively attacking the male? If so, separate them immediately.
* Is the male showing signs of aggression? This is less common but possible, and you might need to separate them as well.
Separation is Key:
* Provide separate tanks: The best solution is to house them in separate tanks. This ensures both fish are safe and prevents further aggression.
* Use a divider: If you don't have separate tanks, a divider can be used to separate them temporarily within their existing tank.
Prevention is Better Than Cure:
* Proper tank size: Make sure your tank is large enough for both fish, ideally 10 gallons or more.
* Plenty of hiding spaces: Provide plenty of plants, caves, and other hiding spots to reduce stress and aggression.
* Introduce them gradually: Slowly introduce the male to the female's tank, allowing them to get used to each other's scent before direct interaction.
Other Important Points:
* Feeding: Make sure both fish are well-fed. Hungry fish are more likely to be aggressive.
* Water quality: Maintain excellent water quality by regular water changes and appropriate filtration.
* Observe for signs of illness: Any changes in behavior or appearance could indicate illness, which can increase aggression.
Remember: Even with the best care, some bettas might be incompatible. If aggression persists, it's best to keep them separated for their safety.