If you have live rock put it in now, don't wait put it right in the faster you put it in the faster your cycles over. You don't need media, your media IS the live rock and sand. It becomes live which means it grows the bacteria YOU need to combat ammonia.
Like I said before listen to the LFS if you want, or get the right answer the first and only time here.
Cliff notes:
If you have live rock put it in now
never use stuff that was used for freshwater unless thoroughly cleaned.
If you have a canister filter or what not youw ant to add, I suggest you add it now. Anything you want to use as filtering add it at the time of the beginning of your cycle, not doing so will prolong your cycle by making mini cycles.
Like I said before listen to the LFS if you want, or get the right answer the first and only time here.
Cliff notes:
If you have live rock put it in now
never use stuff that was used for freshwater unless thoroughly cleaned.
If you have a canister filter or what not youw ant to add, I suggest you add it now. Anything you want to use as filtering add it at the time of the beginning of your cycle, not doing so will prolong your cycle by making mini cycles.