Think your tank is too new. I've found that they tend to open up more in less flow but I have never added one to a tank less than six months old. Your tank looks a month old at most and with dry rock it can take a while for water parameters to stabilize. He does look stressed in the pic.
Not much you can do except give to someone with a more mature tank to hold.
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Back after a 13yr hiatus--much to my wife's dismay. Though she sure loves looking at the tank and feeding the fish!
Current Tank Info: Reefer 450 seed tank for the retirement 315gal Reef Savvy build.
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