Help my zooanthids!!!?

i have a small reef setup with a pulsating xenia, 5 ghost shrimp, 2 stripe-legged hermit crabs, a blue legged hermit, an emerald crab, 2 astria snails, a turbo snail, a clownfish, a scooter blenny, a dominoe damsel fish and, a very small angler fish. my tank is about 2 1/2 months old and i just recently added two zooanthid frags and they havent opened up yet! They have been in my tank for around 48-72 hrs. I had just added some trace elements(kent nano reef parts A and B) the day before i added them, do you think they are going to survive????

What are your water parameters.

Have you tested all of your water parameters?
do your water conditions differ dramatically to the tank that the frags came from?
Keep in mind that as far as reef tanks go your tank is still a little young. As long as you keep these conditions everything should eventually open back up, zoo's are fairly easy to keep.

PH 8.0-8.3
Alk 2.5-3.0meq/l or 7-11 DKH
Ca 400-430(balanced at 429 for 2.5 Meq/l Alk. (balance is key)
Nitrates 0 if possible no more than 5ppm(everyone thinks they have 0ppm but they use cheap test kits.)
Phosphates 0ppm (easier to do than nitrates)

how big is your tank you have alot of fish, and just let time take its course

As long as all of your tests are good and your lighting is right they should be fine some take up to 1 week or more to get active be patient!