You should have never done the FC to start with...........
See the slient cycle(search) on Rex's site and many others (Jared's etc).
This is a bad method in general. If you want bacteria, get them from an established tank(Sponge squeezings/dirt from the gravel vacuuming etc), add them to a new tank's gravel and filter.
Tank's now cycled.
No testing, no wait.
Few folks do not live near a LFS, a friend that has a tank, or don't have another tank or their own etc.
NH4 is a great way to cause algae, waste time seeing if the bacteria have colonized and spend your hobby testing rather than enjoying plants/fish.
You should never measure any NH4 in a planted tank, that's because the plants use up the NH4 as fast as it's produced.