API Ammonia Aquarium Test Strips are a precise way of testing your aquarium water for ammonia. Ammonia is very dangerous and life-threatening to the fish and organisms living in the tank. This testing strip kit reads 0-6 ppm of ammonia. Included in the testing kit are 25 strips, highly precise color charts and information on how to correct unsafe water conditions. You won’t need a separate vial for testing, you only need to dip the test directly into the aquarium water.