Cycling tank question.

[bignose]

Hello everyone, It has been quite some time since I've been here and I have forgotten allot of what I knew. So that being said I have a couple newbie questions.
I started up a 38g tank which I intend on keeping a couple of clown fish for my kids. It has been a week since I added salt water and dead love rock and 4 days since I added a couple pellets of fish food. I know that the cycle has started because of the stench.

1. How long will the smell last?
2. Can I run carbon to control the smell or will this slow the cycle?