i dunno, i know my ammonia did spike since it went from 0 to 1 and is now .5 still waiting for nitrites to spike, she insisted that die off from rock and the dead shrimp is actually bad for my tank and will kill all the beneficial bacteria i need. And that because of that the ammonia will just chill there and the nitrite will never go up....anyone else wanna clear things up for me? Everytime i go to this fishstore i get another story, i just like the free water tests