I am fairly new to this hobby. Currently I am running a 55 gal tank with 80lbs of LR, 200 watts of NO lighting, several different polyps and mushrooms, and a aquatic ecosystem filter. Quickly after setting up and cycling this tank I found an incredible deal on a drilled 75 gal tank with a corner overflow and all the pumps. As you can imagine, I am ready to upgrade and move to the larger tank, but I have no free space in my house to keep the 55 going while I cycle the 75. I was thinking about just transferring the entire 55 setup into the 75. I figured that I would need to put everything into holding containers and then transfer my substrate. Right now I have a 4-6 inch bed of crushed coral, which I know I don't like, but I will be moving this year and I don't want to put to much more into this before I move. So I thought that I would move the substrate and about 50% of the water and let the thing settle for an hour or so. Then I am thinking I can add my LR and the rest of the water. After this settles back down move the livestock and go! AM I CRAZY? I also just purchased a 220watt PC setup that I will be using on the 75 until my VHO/ metal halide retro fit shows up. I have not really had much luck with this tank up to now, and I moved it 4 months ago without any adverse effects. The move was basically performed the way I have discribed here but without moving to the larger tank and with fewer corals. Can I transfer like this? Any better ideas would be greatly appriciated, but I am really looking forward to having a system with a sump so that i can get my auto-topoff system up and running.