Honestly I’ve never had issues with either of those species. Radiants can sometimes be a bit sensitive at first but duskies are usually quite tough.Thanks! Will research those! Live Aquaria has radiant as expert and dusky as difficult - what puts them in those categories?
I like the colors of melanarus, but the owner of my LFS always wrinkles her nose and says, “nah, there are others.“
Melanarus is often disliked because it is common but can be very pretty in the right light. They are more aggressive then some other Halichoeres but in you tank that shouldn’t matter.