How would you switch (move over) a reef tank?

[Myka]

The Eco Rock is probably a phosphate sink right now, test the water and see what you have. There are some great products out there you can use to knock that phosphate out real fast like Lanthanum chloride which I think is best used during the curing process rather than after the tank is running.

I would hesitate to transfer your tank is one day to a tank with that much base rock. Personally, I would want the new tank running for at least 3 months using a fair amount of live rock to seed that base rock.