I don't know the correct answer to this, but can answer from experience. I moved back in January and the last thing to come was my fish tank, a 72 gallon bow. There were no fish, but lots of inverts and about 90 lbs of live rock. I shut the electricity and heat off to the house when I moved and the tank sat there for about 3 weeks before I could move it. During that time, it was the middle of winter in MA, and the temperature dropped to at least 45-50 degrees in the house. I was concered that I lost all my live rock, but suprisingly, once I moved the tank here and re-setup with the same water, I didn't even have to re-cure it. There was no ammo spike or anything. The tank is doing great now, and I'm actually upgrading to a 240 gallon in about 2 weeks. Those 90 lbs of Fiji LR will be going in to the 240, with new rock as well. During the whole time it sat at my old house, it never lost coraline and all 90 lbs are covered in purple right now. Suprisingly, a few snails survived the big dip in temperature as well.
