Whoa. That is one mellow festae. Corys and GTs and Firemouths, oh my!
I just pulled a red Texas cichlid from one tank for killing my Firemouth and chucked him into the WC Red Terror grow out tank.
He's easily 3 times their size and thought he was hot stuff, but they circled him like tiny sharks. It was as if they were saying, "Oh, child, you misunderstand. It is not we who are trapped in here with you. It is you who is trapped in here with us." He watches his back.