Please explain this one

[sully08]

A person practices due diligence and quarentines a halequin tusk wrasse for six weeks in a very established 33g. He is in there with a clown fish. Both due great together, eat well, pellets and mysis. After the six weeks there are no signs of disease what so ever. I moved him over to his new home last night which is a well established 220g fish only. All fish are very healthy and there is no aggression. This morning he is swimming around, eating mysis and pellets and it looks like the other fish have welcomed him, the problem is he has some ick , is it stess of the move, will it go away, will the others get it, any thoughts?