So this is my first post on BRS. here is a scope of my current set up. I have a 72 Bowfront with a 55 gallon sump/refugium. the aquarium is over 6 months. I have a Reef Octopus Diablo XS225 Skimmer. AI Sol LEDs. But my question isnt about the equipment. My issue is the introduction of new fish to the tank. right now i have a Sail-fin Tang, Engineer Gobi, Flame Angel, Mandarin. I am in the process of quarantining 2 True Percs Clownfish and i want to make sure they are not bothered as my Mandarin has lately. Now i have read and done y research and i definitely planned it out. My Sailfin and Flame were the last ones added to the tank. However the initial few other fishes i had unfortunately passed away. Now they have been in there for about a month and from what i say are getting a little territorial with the mandarin. Should i be scared when adding the Percs to the main display? Should I rearrange my rock work(which is what im thinking)? Any advice. I just want to make sure i am introducing them to a safe place. I don't believe taking the tang and the flame out might be an option. they are fast and think it would be more stressful to them and the system.