Sizing Up Tank

[hicksonj]

I currently have a 10G tank, but many of my corals are getting huge and some have even breached the surface. They don't really breach, but they bend over right at the water surface to prevent touching the air. I would like to size up to a 15G tall tank, but I don't know how to do this without causing a cycle. Can I just pull the live rock out, transfer the substrate and water, and place the rock back in? Should the coral come out for a couple hours before the suspended crap settles?

[The Unit]

i did the same thing but because i wanted more room for fish not because my corals were thriving.......i moved it all in one big limp........rock and corals in bucket......all watter and sand in mew tank.....+5gal of new water.....sorta like a nice water change for the tank.....and wala......new tank old inhabitants.....gl