All at once is gutsy. Watch you water parameters to make sure you don't go through another cycle. Was your sand all new(dead) or was any real live sand?
If you have room, try and add a HOB
filter or canister filter with a carbon pad to the tank. It might help clear up the water quicker. I have heard of people using Southdown sand and it taking a week or more to clear. As long as you don't see an ammonia spike you should be ok.
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,