It can take a week or two before corals get used to new tanks. How long has he had them? He may have T5's but he probably has a different combo, brand or life of them, all which could vary the light levels enough to stress them. Not to mention how he acclimated, or what other levels he may have in his tank (Ca
I would give them time, and see what happens. If they are shriveling down, or stuff is coming off of them, then you should be alarmed.