When I moved into my 180 Gallon tank aprox 2 yrs ago, It was more work than anticipated. I was worn out from the move from a 150 to the 180 and stacked the endless live rock in position to not kill colonies that were encrusted over. I have been looking at some rock scaping designs that fellow reefers used and I will be rescaping soon using acrylic rods and glue if needed. How long can live rock be out of water before harming it?