Upgrading to new tank and sump

If you do it that way I would try not to disturb the sand too much (i know it's almost imposible). When you go to fil the new tank I would put a plate or bowl on the sand and slowly add the water dumbing into the plate or bowl first, this will cause alot less disruption to the sand and should help keep the cloudiness to a minimum. I'd also get some new carbon and run that after the switchover. If you knew all this feel free to slap me, if not good luck on the tank move....new tanks are always fun. Jason

 

Also with the old sand bed often times there are areas in there that hold some relatively nasty stuff which can cause some big problems with a tank. If you have to fully disrupt the sand bed I would give the tank a few hours to filter and test the water before you add your corals and fish back to the tank.
Billy

 

More livestock is lost during tank switches then any other time. I would even put all your livestock in a tote or something for a couple days. Run carbon likr Jason said. I would do another water change after it sat for a day & then add 1 or 2 items of your livestock then.

Good Luck with it
Craig