1 week old brain coral not opening

[Jshiloh]

Hello everyone just picked up a pretty pricey open brain coral that looks amazing. When I got it it was open a full bit of course it had deflated in my tank which I common. It’s been over a week and it hasn’t open yet. Does this always happen ? I’ve got a smaller brain next to it ( small green one ) which has opened within the first day. Bigger one ( to the right ) is the new one I got.

 

[Big G]

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