Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
There is not much you can do to hurry the process. It just takes that long for the substrate to go through its cycle.
All that ammonia is feeding the nitrifying bacteria, though, so that is good.
You might find that 2-3 weeks into the substrate cycle the nitrifying bacteria can be depended on to keep the ammonia and nitrite under control, but until the tests show 0 ppm for several days in a row, I would not trust it.