My testing solution is consistently saying I have ammonia in my water ever since I added peat to the filter. It is saying .5 ppm consistently. My readings otherwise are ph 6.4 Ammonia 0.5 Nitrite 0.0 Nitrate 5.0 Hardness 3-4. Water has been cycled since March 10th. There is 0.3% salt level in the water (1/10th ocean salinity). Advise please. The test kit is a liquid/powder mix.