How much have you been dosing with the ammonia? I just finished my fishless cycle a little over a week ago. It took me three weeks. I dosed to 4 ppm
every day. Where are your nitrAtes? Because once my ammonia was disappearing and nitrItes spiked, I started testing nitrAtes. Nothing different happened for about a week, them Bam! Nitrites disappeared too. Keep patient, I have heard a lot of people say that it took over two months for their tank. Also, I only did a water change when nitrates were off the chart, then I just left it alone. Hope that helps.