I started a 120gallon freshwater tank I have a tetratech power filter (up to 100 gallons) and a whisper 60 (30-60 gal.) I got pure amonia w no additives, and added enough to get a readings of 5 ppm on day 1. I added a little more on day 3 to get my readings to 4-6ppm and the tanks amonia level has stayed around 4-6 ppm without adding any more amonia and this is day 11 now. The amonia has not went down and no sign of nitrites at all. On day 5 or 6 I added a used filter pad from a LFS to help out but no changes. Is this a little longer than normal, what do you think? My tap water is conditioned w a simple chlorine/chlorime remover. I used 2 different test kits as well.