My powder blue had gotten ich during the tank move. The water parameters contributed to the stress along with new fish and new environment. I monitored and observed the ich present and disappear. My powder has had no signs of ich since and no other fish had it.
IMO if it's showing up it's already in the tank, why rock the boat unless your fish is in distress. Sometimes the stress of moving back and forth as mentioned above can make it worse. As well hippo tangs and powder tangs are more sensitive and more prone to ich. Best of luck!
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300g Basement Reef - April 2018
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