need help?

[hawaiian aros]

my ngt was stable until a couple of weeks ago, i threw in 2 ITs into my tank around 9-10 in my ngt is about 7
first couple hours the one of the ITs was as stable as it was in lfs
now the only stable one is 1 of the ITs that was unstable in the fish store
first couple days the bigger of the ITs bullyed around the 2 other dats
but i guess the ngt couldent take it anymore and has now become the boss
and now is constantly picking on the bigger of the 2 its
should i seperate?
need advice pls
tank is 300gal
i tried removing the black backing, taking out drift wood decors,
no change, and now im trying to put a better filtration(building a sump)
or is 2 weeks to soon

 

[Ade]

If it's just some lost scales/ split fins, and minor damage, don't worry, it's purely tigers establishing hierachy.
If you see serious damage inflicted , ie 1 dat continuously beating crap out of other , them best to separate OR add some more tigers.

My 7 inch ngt, lost bout 1 square of scales. Cloudy eye from an attack,also.
Just did extra wc, added salt, all healed - 2 weeks.

 

[gangster]

Add more dats

 

[hawaiian aros]

every time he attacks
spits out couple scales
this happens constantly and runs away alot
but still is the pig of the group
i have nowhere to seperate

 

[vanimate]

I would add some more dats, try adding some of different sizes (smaller also) to make it feel more of a comm tank than competition.