Ammonia should not be present in a fully cycled tank, and there should be some nitrates. It sounds like it's still cycling then.. It's a good idea to test daily and do a 50% change any time you see as little as .25ppm. It's gotten way to high at this point..
What filter are you using and how have you maintained it?
How long has the tank been set up?
100% water change does not hurt your cycle. The bb is in the gravel, decor and mostly filter, but not suggesting you do this. Just need to monitor more closely
Last edited by callistra; 01-15-2013 at 11:49 AM.