Upgrading my tank

[scabbedwings616]

I am going from a 37g to a 90 gallon tank. I have a lot of coral that is smaller frags, some zoa, toadstool, leathers, and a Kenya tree. What I am worried is about water. Will it be ok to add that much water to a new tank and start over. I have about 90 pounds of pukani rock that has been in my 37 tank or curing in a tub. What do I do with the corals when I change everything out? Will the corals be ok to add right back into the tank when it's all set up and everything. Any advice on what to do would be great.

 

[scabbedwings616]

I will be adding 80 pounds of Fiji pink sand and about 15 pounds of the sand from my current set up. I also have seahorses in my tank and I know I'll be stressing then out but want them to be happy. I have peppermint shrimp, pipefish, target mandarins, lawnmower Blenny also.