I have also done both. I moved last Feb and put fish in about 3 insulated containers after warming with tap water, dumped it out and refilled with tank water.
I saved most of the remaining tank water to move the LR and the few corals I had.
This gave me good clean stable water for the tank after it was moved.
It wasn't easy but it did work. I only lost 1 coral.
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**~~Bryan~~**
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