Niger trigger vs clowns

[Spliff91]

I have had my 135g for about 4 months now, the first fish i added where 2 clowns and a royal gramma, this month i have added a niger triger and a naso tang. Everything has been fine except the last two days the trigger has been really aggresive towards my clowns chasing them around, also my emarld crabs have turned nocturnal only coming out at night.

Is there a solution for this

 

[roka64]

What kind of clowns? Nigers are the more aggressive of the triggers. I rarely see my emerald crab but if the change in behavior came about with the addition to the trigger, I would say they are hiding from a predator.

 

[melosu58]

also my emarld crabs have turned nocturnal only coming out at night.

Is there a solution for this

Yes get rid of the trigger. Your inverts are not safe while a trigger is in the tank.
BTW welcome to AA

 

[Spliff91]

They are ocellaris clownfish. thanks for the advice.