Sagging Nepthea/sinulara? coral

[truben1010]

I bought this frag of nepthea coral about 5 days ago and it’s had me worried. It shrinks at night and expands upwards when the lights come on... but toward the end of the day it just starts to sag. I’ve also had him in this little box trying to get him to attach to some rubble.

 

[rkpetersen]

Might be too much light. Or not enough flow.
Could just put it where you want it, it'll eventually attach to whatever's there.
They're pretty hardy, generally.