Add live sand right away...and some live rock, you could even get un cured rock to start your cycle. Then after you add that, just wait a month or so, can be less. You shouldn't really need to dose anything, at least at the beginning. Salifert test kits are suppose to be the best. Just put the sand and rock in and read on here for a month before adding anything. Patience is the biggest thing in the beginning, can't stress that enough. You can even feed the tank a little when there's nothing in it, will help build up your bacteria colonies as it decomposes. Then get 1 or 2 hardy fish, and add them. Don't add anything you don't really want, as they can be hard to get out, and if they're hardy fish, they'll be in there for the entire life of the tank more than likely.