Okay, first off, you don't need livesand...More than likely the stuff has been on the shelf so long it's all dead. Your LR
will make your sand live soon enough.
You may want to get something a little coarser then #0. Someone else will have to help you on the # of the sand.
Do the removal in steps. Do half and then do the other half.
You do not have to remove your LR
or fish to do this. If the CC is small enough suck it out. Rinse out your new Aragonite well and then Make a funnel out of cardboard or something like that and pour the sand in slowly. The water will get a little cloudy but should clear overnight. When it's time to do another PWC
repeat the process untill it's done to the depth that you want. I run a Deep sandbed ~4-6" and use that to help keep my nitrates down.
Good luck and take your time. It does not have to be done in a day.