I will be setting up a 240 gal or maybe bigger 8 foot long acrylic show tank with lots of live rocks and lots of assorted tall and wide fake corals (petsmart) from my 3 100 gallon tanks. My objective, to house and test compatability of my medium Majestic, regal, Annularus, Asfur, younger Cortez, koran, emperor angels together all mostly friendly and non agressive at present... And yes, a fairly large group of 6 or so Copperbands and other assorted butterflies and blue tangs, orange butterflies, heniocus I notice do play and school together occassionaly in the 100s. Also to test the waters with my non agressive powder blue and white cheek tangs and batfish in the tank before putting in most of the rock and coral in case I need to remove any for agression or territorial problems when blending the 3 100 gal tanks occupants. together To bad for the brown tang and regal tang who didn't make the cut for the move! The 6 firefish (was 8 but 2 jumped out) and clowns can finally have a break from all the relentless tangs darting around.