Ich and what carries it?!

[Justusfish]

I am buying a 210 gallon tank with no visible Ich on any of its occupants. My 50 gallon tank has 8 fish in it, three with Ich, (relatively mild) Two tangs and one Maroon clown affected. The damsels and pajama cardinals, a non-issue. No ich.

So my question is this: Can I put my live rock from the "iched" tank into the 210 or do they contain ich? Can I move my corals over? Then I could treat my fish after removing the rock and coral with chemicals and quarantine them for eight weeks before moving the fish into the tank?

Is any of this feasible?

Thanks