I change over from a 30 gal to a 40 breeder about 3 weeks ago. What I did was I transfer half of my live sand and put it on top of the new sand and half of my old tank water. I test the new water to make sure it was as close to the old water as possible then I put all of my live rock, fish, and coral in the new tank. Within two hours all my corals were open and all the fish were swimming around. I check my water chemistry everyday other for about 2 week to make sure the tank wasn't going through another cycle. So far my readings are
Ammonia - 0
Nitrite - 0
Nitrate - 5
PH - 8.2
Cal - 420
Alk - 9
It's been like this since the transfer. If there was going to be a cycle I believe it would have happen by now.