Your best results will come from properly maintained chemistry levels (NSW
values) and time, the latter being the biggest factor. No matter what you do, it won't really start to get going typically until about after the 6 month point when the tank starts to stabalize and begin maturing.
For the time being let the tank do it's initial cycle, do a large (upto 50%) water change after the cycle
and maintain the chemistry after that with regular weekly water changes. Additives at this point and the near future are completely unneccessary and ill advised.
Let nature runs it's course and in no time you'll be cursing it's growth rather than trying to speed it up.