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

[CM125]

Next time you do a water change, put all that water in the new tank, get the new tank to about 50/50 of water from the old tank and the new. continue testing for a week or so, but everything should be good to transfer over. Shouldnt need to re-cycle with 50/50 water. You will need to re-place every piece though as flow and lighting will be different then the other tank.