DAVIS!!!

First of all welcome abord!! First thing I would do is slow down. That is the #1 factor that will make or break a successfull tank. first off what sort of filtration, lighting, are you using, type of gravel.
This is a very crucial period for your tank. your conditioning the tank. You have some pretty dynamic things going on in your tank right now. You are growing bacteria in the sand bed that will help maintain a healthy tnak in the future. You are a few weeks out before adding any live stock.
If you could give us some more info the equipment your using that would be great