I have two tanks tied together via a common sump/filtration room.
In my 24 Cardiff I have 20 bubbletips (Entacmaea Quadricolor), 6 rocks (Epicystis Crucifer), 2 maxi (Stichodatyla Tapetum) and 2 tubes (Cerianthus).
The other tank, 93 cube, houses a Stichogactyla Haddoni and now a new recent addition of a Heterodactyla Hemprichii.
Seemingly by choice none of the species seem to locate themselves within touching distance with other species in tank. From that they all are thriving and have been for some time, aside from the newest addition whichhas seemed happy since I added it a few weeks ago.