Just started up a new 29 gallon Fw want, decided this time to do it fishless by adding ammonia and i added some gravel from my established tank into the media container of the new emperor biowheel filter. adding enough ammonia to get it to around 5 ppm, the next day, ammonia reads 0 ppm. but now im getting both off the meter nitrAte and nitrIte readings. what should i do? continue adding ammonia? water changes? thanks in advance for your guys help!!!! appreciate every bit of it! 