Geez, guys, I've moved several tanks times, either from one tank to another, or from house to house and never lost anything that I can think of right now. Of course, I didn't/don't have a lot of stony corals, mostly lps and softies with some sps.
The key from moving from house to house is to move the tank on a separate day from furniture/household goods moving. That way lots of time can be taken for moving the tank contents. Have lots of pails for LR and sandbed if you have one, and rubbermaid tubs for moving corals and fish. Also, clean as much algae off the tank walls the day before so when it dries out during the move it's not going to cause a spike of any kind. At your new place, have lots of NSW made up prior to the move to top up for whatever water was lost during the move.
Tank moving day is a good do to clean your LR. Have a bucket a third full of tankwater. Each rock coming out of the tank gets a good swish in the bucket. TONS of crud will come out of your rock and your bucket will get filthy
Dump the dirty water from time to time, refill with tankwater and keep swishing.
It's been so long since I moved a sandbed, that I forgot exactly how I did it. Once all the corals, fish, inverts, LR are out, there will be some water left in the tank covering the sandbed. I think this is when I stirred up the entire sandbed (at least 3" deep) to off-gas the stinky bad stuff from the lower layers of the sandbed. Here, too, the water would get absolutely filthy
I'd scrape the sandbed to one side of the tank, siphon out the dirty water, add it the sand to pails, then move everything to the new place. Have lots of muscle carrying the tank, stand, lighting, other equipment, pails and tubs
