If you have ammonia then that means that your tank is not cycled yet. No biggie, you're just going to have to be diligent with checking your water params and water changes. I would check with your test kit once per day for ammonia, nitrites and nitrates.
Using chemicals to resolve ammonia issues is never a good idea. Water changes are the best remedy. You should do one 50% PWC weekly and another 50% anytime you see ammonia get .25 or over. Same for nitrITE- and nitrATE if 20 ppm or over. Make sure you vacuum the gravel once per week, too.