Ick doesn't involve skin coming off. That is velvet and will wreck havoc in your tank.
It may also have ick in regards to the white spots but velvet is what makes there skin slough off.
I would quarintine him/her and treat it myself as velvet can make its way through your tank rather quickly. So can ick mind you 
Just my 2 cents worth
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180 gallon SPS Dominated reef, Reeflo Orca 200 skimmer,Proline Zeovit reactor,3 250 watt halides in lumenarc mini reflectors and 2 vortecs for flow
Numerous corals,2 purple tangs,choclate mimic tang,Foxface,Solar wrasse,male and female lubbocks wrasse,hoevens wrasse,Carpenter's Flasher Wrasse,Blue Sided Fairy Wrasse,yellow wrasse,3 Yellowstripe Anthias,True percand S.Gigantea anemone
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