I agree with @zheka757 . I won't buy frags that haven't started to encrust. They do much better if they're allowed to heal in the tank they grew in. JMO
I got a few of them and some of them just took off and encrusted out the whole plug in like 2 weeks. This one I guess won't but I'm kind of worried about the pattern here. I've seen RTN/STN and usually it's just white like all the flesh is gone, it looks different here like the skin is being eroded away.