Lowered my nitrates

[FishyFishy!]

Since nitrates are generally only in your water column, the best thing to do is find out where they are coming from, eliminate the source, and do large water changes if you don't already have coral in the tank. If you already have livestock in the tank, then frequent smaller water changes will help. In your case of a new tank, I think this is the best option for you, as you don't have other factors like under gravel filters, bioballs, old ass filter pads or overfeeding to contend with.

Other than that, you can try bio-pellets. These seem to be working on many peoples tanks, but I personally think they are a bandaid fix for another issue in the tank. They can also do a lot of harm if used incorrectly.

Or you can use the proven methods of vodka/vinegar dosing, but at this stage of the game I would stick to keeping it simple with regular water changes.