I think a large portion of it has to do with feeding as well. I feed a large quantity of a wide variety of foods (flake, NLS pellets, mysid, spirulina brine, baby brine, and rods food) 4x daily and also get 3 clams on the half shell and 2 sheets of nori daily. My triggers are fat, growing fast, and don't seem to care about one another or the little fish. The three triggers (Niger, pinktail, and bluethroat) school with a large pink square anthias, 2 dispar anthias, an evansi anthias, 4 bicolor chromis, 5 green chromis, 5 lemon damsels, a pajama cardinalfish, a banggai cardinalfish, and a firefish.