My 30 gallon tank has been set up for three weeks. I have 6 small cichlids in it. I have been getting a steady reading of 1ppm ammonia for the past week. I did a partial water change (5gal) a week ago. My nitrites is 0. Should the ammonia be rising at a faster rate? Should I be getting a nitrite reading by now? I add prime conditioner to the water before putting it in the tank. The fish seem healthy. They are eating and swimming around the tank freely. Should I do another water change?