First of all, Kennyboy, learn to use the "edit" feature so you don't post 16 times in a row.
Secondly, companies like PetCo SELL FISH and only have the fish in that environment for a period of days or rarely weeks. A QT has the same principle; fish are only in there for a short time period. If your tangs show no signs of ich in your nano, why are you doing hyposalinity for a month before adding them to a new tank? Doing such a task only adds the exclamation point to how ignorant of a reefkeeper you are. I would recommend not doing that, but you'll do it anyway, or maybe you are assuming they will have ich from the stress caused by their closet they live in. Oh wait, your tank doesn't have ich. My bad. They will never get it. Well said, kennyboy.
As to the poor, helpless tangs that you are owning, may you have a wonderful sized tank in your next life.
For the record, I would LOVE to see a picture of this "125 gallon tank." Take a picture with two $1 bills in your hand, infront of the tank. I would love to see it.
-Ben