API Ammonia Test KitAPI Ammonia Test Kit The API Ammonia Test Kit for NH3 and NH4 provides enough solution for 130 tests. Solution is a far more accurate measure than colored test strips and is nearly as fast and easy. Each kit comes with color scale, drops, instructions, and beaker. Periodic ammonia checks are a must to prevent rapid fish loss the crashing tank phenomena. API Ammonia Kits for carbonate hardness work with saltwater and freshwater aquarium water.