Ricordea Question..

I got my Orange ricordea about 5 days ago and its been great its eating well everything. but i dont really know how to ''read'' coral behavior so i dont know if what its doing is normal.

Its pretty much cupped its self and it opens up sometimes..

What can it be??
My tank parameters are..
Ammonia: 0
Nitrite: 0
Nitrate: 0
salinity: 1.024

Can it be the waterflow? please help..

First picture is how it looked the day i got it.
and the second is how it looks today.

Last two i just uploaded right now

 

It kind of looks like to me it's starting to split, I don't think there is anything wrong at all, but you will get better input from more experianced reefers.

 

mine seems to do this from time to time, only my yuma rics though. not sure why but my orange yume does this everynight from lights out to lights on, for almost a year.. then it the day its fine.

 

Mine do this if I turn the lights off midday for whatever reason.

I wouldn't worry to much though, they're extremely hardy. I once dropped the rock mine were attached to and ground them up a bit. The two Rics I had at the time were torn into three, plus some tiny shreds. Those tiny shreds took off and now I have about a dozen.