Thanks for the ideas everyone. I appreciate the offer
@scmountain.
@SynDen kindly allowed me to borrow his 75 gallon to serve as temporary tank. Using the ideas given here, and some brainstorming of my own, here is the tentative plan:
I'll setup 75 gallon temporary tank at our old house with a heater and single mp40. I'll mix 30 gallons of fresh salt water to keep at ready for water changes in temporary tank. Then I'll bring the RODI to the new house and setup to make water in the basement. This is where the new mixing station will be. It's an unfinished basement with floor drains.
Back at the old house,
I'll initially fill the temporary tank with water from the 90. I'll add bags of ceramic media and smaller pieces of live rock that have been in the sump of the 90 gallon system. Then the fish and coral will get transferred.
I'll breakdown and pack up the equipment, tank, stand, and lights for transport. I'll setup the 90 gallon system at new house. I'll use new substrate and start filling with fresh mixed salt water. Bring the equipment back online and monitor parameters. Once things stabilize, I'll transport livestock to place in 90 gallon.
Questions: how long will the livestock be able to reside in temporary tank with no lights?
Anyone familiar with the water quality in Erie?
What considerations have I not accounted for?