Upgrade NanoCube28g to RSM250 - Aquascape Question/Feedback

[gregzz4]

Just to clarify, you don't need to keep both tanks running parallel with my suggestions. You can do a one-day transfer if you;

Cycle the new rock in the tub and complete the probably 4 week cycle.
At this point you can start the new tank with the newly cycled rock.

Then you can deal with the old tank and rock at your leisure.