Several Pseudochromidae?

I am leaning towards keeping several Pseudochromidae in my tank. The hardy
and semi-aggressive descriptions of them seem to suggest a
slightly-less-poorer-man`s damsel. They seem to be durable,colorful little
fish that I WON`T ultimately want to extricate from the aquarium.

Here`s the rub---due to territorial issues, most places suggest to add all
of them at the same time.

Should they be separated , like Bettas , in a quarantine tank?

In general, if I get fish advertised as tank-raised, does this significantly
reduce the need to quarantine?

thanks again