Hi, I have set up my 29 gallon freshwater tank after not usuing it for years. I have a emperor 280 filter, a 100 watt heater. I added my substrate which was thoroughly rinsed before put in and I added a bubbler and turned the heat up to 84F. On june 17th I added 4 ppm of ace hardware ammonia and I have been checking my water properties through out and here we are on day 20 with no ammonia drop and no nitirites yet. pH is 7.6. I checked my KH and GH and the KH is 5 and GH is 3 degrees. Is this sufficient? I feel like something is stalling my cycle. Any suggestions?