A friend and I moved a 150 last year. The live rock it contained sat in covered plastic trash cans with damp rags wrapped around each rock for about 6 weeks in his garage while we rebuilt the stand and reworked the filtration.
When we opened the cans some of the rocks and rags had some mold growth on them. We scrubbed them in saltwater, put them in the tank and filled it up.
It took some time, but today there is nice coralline growth all over the rocks and everything is doing well.