Yar. How I did it was like this.....I have 2 storage containers that I use for water changes, they each hold approx. 15-20 gallons of water. I filled one completely with water from my old tank before I broke it down, this was the clear container for the fish and its longer so they have more room to go back N forth. I use this particular container for the fish because its easier to get them out of than a darker trash can. I then added a spare heater, filter, and powerhead to it. Also added the Tonga live rock pieces I wanted to keep, and some spare fake corals, so the fish would be somewhat comfortable and have places to hang out. They were in there for less than 2 days while I got the old tank out and the new tank in, and setup.
I then filled the 2nd container with half water from my old tank, and half NEW saltwater. Kind of like a small water change. I then added a spare heater and airstone to this water. This is the water I used to seed the new tank with, and I used it to acclimate the fish. The rest of the water for the bowfront was fresh mixed. It's not the easiest way to acclimate, and I had alot of containers and crap lying around lol, but it was worth it. The fish are doing great, and my levels are all at 0 for the first time in awhile. In the old tank, I always had nitrates between 20-40, even after doing 85% water changes. I would leave just enough water so the fish could swim around lol, and I would still get those nitrate readings.
I also have some Turbo Snails, and 1 pretty good sized Hermit Crab. They are also doing great, the acclimation system I came up with seems to have done well. Here's a pic of my hermit, i caught him spinning the shell of one of the Turbo's around lol....
He was probably lookin' in there to see if he could climb in :hilarious
BTW, I also "seeded" the tank with 40 pounds of live sand from my old tank. I added another 40 pounds of aragamax. And any LR that is in there now, was in the 1st container with the fish, so there wouldnt be a "re-cycle" and an ammonia spike.
Hopefully my new Orbit light system will be in Fri. But I have a feeling I wont see it till next week