Tested the tank again today, still at a 0.50 ppm of Ammonia/Ammonium, temperature is at 79F, PH is 6.8, NH3 levels should be well below toxic, but ammonia is bad, so I'll be performing a 15% (~5.4 GAL) water change.
Fish-in cycle was an accident, for more info please read: Broke the Aquarium...