I am thinking about getting a 12" Dorado from a buddy. Right now, everybody in my 850 gallon is pretty much mean as hell and holds their own or larger enough than the others that they don't mess with them. I have a 11" Jag, 11" Ocellaris, mated pair of wild doviis(18+" male and 12+" female), 10" false red terror, silver aro (not mean but 22+" and everybody leaves him alone), 14" Indo dat, and 23" lieucystic tsn (not mean, but nobody messes with him) a 16" clown knife and an 12" rck. The doviis pretty much rule the tank, but I am getting rid of the female so they won't gang up on the others. I am also getting rid of the ck and the rck. The dorado in question is not beating up his current tankmates. Also, I'd like to swap out a few other fish and add some more PBass later. Can I safely add the dorado once the female dovi, ck and rck are gone?