a quick note:
You can not cycle a tank with uncured rock........not uless you completely did a strip down and clean to remove all the dead stuff from the tank bottom and do water changes to remove nitrates etc.
It is a common mis-conception that tanks need to cycle. It is the rock and sand that need to cycle. Therefore, curing the rock first and soaking sand in old tank water will result in substrates that are "ready to go". Adition of these to a fresh tank will result in asystem that is capable of supporting marine life. Of course the tank has to mature a little before beginning to stock it.
The key isssues to a succesful cure-tank set up are subtle and gentle changes. For rexample, once cured, keep the rock under water with plenty of flow. When you move the rock try to do so with minimum air exposure. Ensure tank and water in curing vat have same temp and SG. stuff like that.
The process of curing is essentially allowing the bacterial populations to fluorish while the dead stuff rots off. AS the dead stuff rots off the bacteria grow and a balnce is hit. Once the nitrates no longer go up in the curing vat and begin to drop it time to blast the rock, blow the gunk out, do a gentle water change...watch for a nitrate spike.....if non occurs.....its time for the tank.
not the short note i intended.....sorry.
P.