Transfer--what do you think?

[Mrfish55]

When I upgraded from the 180 to the 300 I mixed up 150gals in the new tank (getting temp and salinity the same), then did water changes back and forth between the two over a few hours then moved everything at once. Only lost a couple corals (they were questionable to begin with) and was carefull with feeding for a couple weeks. Total time to do the changeover was 6 hours (moving from one house to another)