Cycle question

[Skimmer Juice]

Originally Posted by asylumdown

+1 to the others. If all the rock from your old tank is going in to the new tank, and there's no new uncured live rock going in to the new tank, your cycle will be so small it will probably be undetectable.

You only need to worry about it if you're using all new rock in the new tank.

so say the tank you were doing a swap from was 60g and the new tank was a 100g . Could you just swap everything over ,if you were not adding anything new. Except for the water you have to add to fill the extra 40g ? It would be just like doing a 40g water change?