I introduced 5 new tangs yesterday, all at once (3x Zebrasoma, 2x Acanthurus), all juveniles, no issues so far. Naso, Hepatus and Siganus accepted them to the shoal and they are all swimming together most of the time - 7 tangs, siganus and all wrasses. I wasn't sure about Labroides dimidiatus, but it eats a lot of frozen food, so it might be fine. I feed a lot, 2 times a day frozen and 2 times pellets to keep all fish fat and healthy and once all hair algae is gone (which will be very soon), then I'll keep nori in tank all the time. I don't plan to buy more fish at the moment, maybe Neocirrhites armatus / pair and if there will be enough pods in 2-3 years, then I'll consider a pair of mandarins, but with 3 Halichoeres wrasses, I don't expect this to happen.
Current stock is:
Amphiprion ocellaris pair
Halichoeres chrysus
Halichoeres melanurus
Halichoeres Iridis
Labroides dimidiatus
Salarias fasciatus
Oxycirrhites typus
Siganus magnificus
Acanthurus pyroferus
Acanthurus olivaceus
Naso elegans
Paracanthurus hepatus
Zebrasoma desjardinii
Zebrasoma scopas
Zebrasoma xanthurum
And fish I have in 80 gallon and will move later:
Gramma loreto
Paracheilinus carpenteri pair
Pterapogon kauderni pair
Chelmon rostratus
Ctenochaetus strigosus