New Blue Hippo Tang with ICH??

Just received a Blue Hippo from E-Tropicals on Tuesday. By Wednesday night, it had numerous small white spots on it (ich?). It has remained in hiding for the most part. It generally stays in and under the LR. Its color is excellent and it has not shown any scratching behavior that I have seen. The fish is in a 55g with 70lbs LR, Astrea Turbo snails, Blue Leg hermits, and assorted things growing on the LR such as a few zooanthid polyps and featherduster-type worms. Blue Hippo was placed in this tank (rather than q-tine) to help cure hair algae problem. I was planning to wait 30 days before moving the fish to my 90g display tank. The LR was going to eventually follow into the display when the hair algae problem is cured.
I have a 20g that I can set up to run hyposalinity at 1.009. Should I do this immediately or wait a few days to see if the “shipping stress” takes care of itself?
 
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