Green Star Polyp

I bought a frag of Green Star Polyp from the LFS and drip acclimated for about 5 hours. It's been a day since that and it still wont open up. I tried giving it similar flow to what it had and the store. I chose this frag because I havnt had any luck with corals yet in my tank and would love to get them going and green star polyp is pretty hardy from what I've heard. Any ideas or help on why it isn't opening up?



Frag is about 4" by 3"



Nitrates 15ppm

Nitrites 0ppm

PH about 8.2

Salinity 1.0255

Phosphates less than .1

90 gallon tank



Yellow tang, 2 black edged clowns, 3 small damsels

I have T5's (2 blue, 2 white) and a fluval marine led over the tank.