Do I need anything else in my new saltwater tank?

I just bought a used biocube (all parts intact and working, great shape) and have filled it with water (specific gravity 1.024, slightly high but in normal range, pH=8.2). In the tank I have live rock and live sand given to me by the seller of the biocube from another established tank. It is probably about 10-12 lb of live rock, and enough live sand to provide just under an inch of bottom cover. I also am adding biozyme (I think that's what it's called) to give bacterial colonies a boost. Is there anything else I should add/take out for cycling? Namely, should it have another source of ammonia, or should I add in cured live rock/not live sand to the tank? I've heard from some that these should be the majority of my tank, with the live rock/live sand consituting only a small portion during cycling. I just want to do everything right and I want the tank to cycle properly....