My tapwater is testing .25 - .5 for ammonia. I tested it because though I am getting nitrates and I believe my tanks are cycled, my tanks still have very low ammonia readings at times, (like .15 - .25) according to my API test kit, but the numbers never go up or down. Figuring it was chloramines in the water, I used API water conditioner at chlormamine-removal strength and retested but the results were the same. What can I get to remove the ammonia? I've heard Prime will remove it but then I've also heard it still shows up on the test kit even when treated. And why would Lake Michigan sourced city water have any ammonia in it anyway? Is it harmful to me?