Hello everyone, new to the hobby and already perplexed!

Hi everyone, so i thought i would ask this question here since its a newbie question. I bought an 8 gallon tank, added 7 pounds of "cured live rock" and added the nutri-seawater. I have a ph of 8.3, and a temp of 78 degrees. I am not adding any live sand, just keeping it bare bottomed.



So anyways i went to test me levels and it says i have about .25 or .5 ppm of ammonia, 0 nitrite, and 0 nitrate. Is that normal for nutri-seawater? I then tested my tap water and my tap water had 0 ammonia which is good but why would the nutri-seawater which is suppose to be cured water have ammonia? Hope someone knows!