Depending on how long it will be down, you shouldn't have too much mortality when you move it; just put it in a big tub and get as much tank water as you can on it and circulating. I'd throw away any sand that smells like rotten eggs; it's sulphur dioxide (or something like that) from O2 starved areas in the sand bed. 3" of dry sand in a 150 is about 275lbs, I think, plus 3-4" of water is probably about 20 gallons or another 150lbs, so moving it could be pretty nasty. How did Pete do it?