Use the API® Ammonia Test Strips as the quick and accurate way to test for the presence of ammonia. Kit reads 0-6 ppm of ammonia, and alerts you to unsafe ammonia levels before they can harm fish or result in fish loss. Kit includes stay-dry tube with snap-tight cap, and information on how to correct water conditions. We recommend that you take a few minutes each week to monitor your aquarium conditions and create a better underwater world for your fish. Testing your aquarium water has never been so easy or accurate!.