Help green terror caudal fin

[Adamamc81]

There is always a dominant status among fish especially Cichlids the Green Terror may be at the bottom. You may have to remove the Green Terror it will not heal in the aquarium.

I have been watching and he is the one doing the chasing the only one who sends him away is the jack dempsey so I don't know if its the jack dempsey that's done the damage

 

[HybridFinatic]

This is the result of poorly mixing South and Central Americans. The fin will fully heal though. Just provide clean water. No extra treatment should be needed.