When I consolidated two tanks from my office (I cancelled my lease) I moved from a 10 and a 30 to my 96 I used all my old rocks and new sand. I used the instant bacteria and put my fish in the same day (all fresh clean water and did a long acclimate). I had to get my tank out of the office that day, so there was no chance to take it slow. Everyone survived. I did do 5% water changes every day and saw a mini cycle.
Fish brought over:
Diamond Goby
4 clowns
1 tiny blue tang
yellow wrasse
2x cleaner shrimps
CUC
David