Make your fish feel a little bit more at home. Rehome that lungfish or else he will take big chunks out of your other fish (I'm not sure though, I just read that from another thread). Nonetheless, nice fish!
hes doing fine man always doin his own thing i think they take chunks out of other fish because of poor eyesite not agression. i have thrown in some rocks and fake plants and im already seeing that the fish are more calm , going to add more one i hit the LFS