agression

hi all
just bought a firefish & hammer head coral last night...acclimated and both r u fine...
although i am seeing some agression issues between royal gramma and firefish...currently firefish is hiding somewhere inside the rocks...any ideas on how to reduce this agression?

Thanks

another Q. my toadstool's stem has shurnk a lot and is curved the head seems to be ok as i can see small tentacles come out. anyway i can make the stem straight or is this normal? any help is appreciated.

Thanks