I'm sorry, but having done this several times myself, I have to completely disagree. If all you're doing is moving your rocks and sand from one tank to another tank, then it will be fine. Will there be a mini cycle? Yes, for MAYBE a day or 2. Otherwise if all you're adding is new water then you will be gravy. It's when you get into adding new LR when you run into issues. And even then, when I went from my 72gal to my 125gal and added a boatload of new LR, it was established rock from another tank that someone was breaking down. So it still wasn't an issue. I didn't lose a single coral, fish, or invertebrate during that move. If you want more information I would be happy to go into detail on how I did that.