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I'd move it down away from the light for a time.
I could be wrong (probably am - I've been called out all day today for being wrong at work, so...) I've read that the zoox can produce excess amounts of oxygen for the coral resulting in "blisters". There's really nowhere for it go - except out. This is more likely to occur in LPS and soft corals than SPS type corals though.
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when in doubt - water change
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