Plate Coral not opening

[ss2mirai]

My dad's plate coral not opening at all since purchased. Every coral he bought is fine except for the plate coral. Please help as my dad and I dont know why is it like this

 

[SnazzyUrchin792]

My dad's plate coral not opening at all since purchased. Every coral he bought is fine except for the plate coral. Please help as my dad and I dont know why is it like this

Can you provide pictures?

 

[Mr. Mojo Rising]

Please provide the pictures, and water parameters?