whe they are settled and not stressed they are jet black - with a blue tinted eyes - I think they look good, better than the usual brown bristlenose or G(yawn)BA
as long as you have room and plenty of plants - and of course everyone is well fed - should be OK as a temporary measure. Good trick with those Swords is also regular water changes - I do a 20% change a few times per week.
the fish were bred in NZ - tank bred and far stronger than imports. The original strain was imported. Imported fish - as we all know - can be a wee bit fickle - these were brd in NZ water in NZ tanks under NZ conditions (No hormones etc) Hope this clears things up
Matt