well not to sure but when i rescape i wait till i have to do a water change that way i can pull out some of the dust and anything bad that got mixed up
Ahhh, reaquascaping. No matter how careful I am I usually end up accidentally fragging coral. Like the previous responses suggest, perform a water change and have some fun. Post some pics when you're done!
There is absolutly nothing you need to worry about unless you have large colonies, since its been up since June, I highly doubt that you have large colonies to worry about.
Just move the rocks and it will be perfectly fine.