a great :read:
http://www.reefsanctuary.com/forums...something-cycling-breaking-new-reef-tank.html
My thoughts... it all depends on the state of your LR, many lfs call their LR cured, but this can be pretty subjective and depending on how it's handled, the die off varies...
The nitrogen cycle starts with something that died, as it decays it creates ammonia ... this is what a rotting shrimp (prawn) is doing...
Watch for the ammonia to soar then fall to zero, then the nitrites soar & then fall to zero, then the nitrates soar, once this happens, do water changes to get rid of the nitrates - tank cycled
Depending on the state of your LR (how cured it was & how much die off it had), in general it will look something like this...
there other ways to cycle a tank, like adding liquid ammonia ... this ^ is an "old school way" that has worked from many & is one proven method