...and, considering blue tangs can be notorius for being ick magnets, his journey to the 210g could be stressful enough to have something bad happen. Have you thought about a yellow eyed kole tang. Lot smaller.
MarkW19 said what I should have a lot earlier in this thread, but I'm not sure you're willing to listen to that.
"Life may not be the party we hoped for but while we are here we might as well dance!"