I'm late to the thread, but I'll follow and help if I can. It will take 6 to 8 weeks for the processes of mineralization and nitrification to become established. There is what is called the 90 day rule. You should wait 90 to 180 days for micro- and macro fauna to develop without the addition of fish, coral, or light., as they help with the natural balance of the aquarium. My last tank was fishless for 6 months (lights for 6 hours 3 of those months) in order to get a good growth of algae and a sustainable population of copepods. Also I didn't add algae or copepod eating fish for one year. Some aquarists in Germany recommend a year for a good self-sustaining copepod population. Allowing these organisms to proper will also help with nutrient control.
I know it sounds terrible, but the 90 day rule is very good advise.