Advice needed

[dirk_brijs]

Have a 1800lt fish only tank. All parameters close to perfect and all fishes doing great....
Now wanne add more fish to the system but most fishes look aggresive to any new commers
So what you guys think can be added
What we have now...
1 xl size banner...1 xl size yellow belly dogface puffer...1 porcupine puffer...1 valentini puffer ..1 picasso trigger ..1 harlequin...1 foxface...1 blue tang....1 big eye soldier...1 boxfish...1 brown tang (super aggresive)...several blue damsels...several blue green chromis...2 tomato clowns (paired)...some clownfish.....
Any suggestions appreciated...tried some Angels before and some butterflies...and tried a few times spotted sweetlips....

 

[dirk_brijs]

Thats not alot of ideas or opinions...

 

[alton]

When trying to add new to old I section off the tank to give the new comer time to adjust. I have attached a picture of my old 300 as an example

 

[Dmorty217]

You will need something aggressive like a grouper or another trigger. A snapper of some sort might fit the bill too

 

[caribfan]

I always find that feeding a lot the week leading up to the new addition helps. I think a lot of aggression is related to food supply.