I got 2 zoa drags from a fish store I don't usually go to, one of them is doing real good. It opens up fully and seems to be healthy, the other one unfortunately is not opening. Well not all of them are opening. Both frags are in the same level of the tank as each other. Why would one be fine and he other not? The first picture is of the one that's open, the second is of the one that's not, and the third is to show that they are pretty much in the same spot.
