Tetratest Total Ammonia Kit Is Safe And Accurate To Use With Other Chemical Products That Remove, Reduce Or Detoxify Ammonia From The Aquarium And Which Can Cause Interference With Less-Expensive Single Reagent Test Methods. This Kit Is Suitable For Freshwater (Including Outdoor Ponds), Brackish And Saltwater Systems. The Tetratest® Total Ammonia kit was professionally developed to accurately determine the ammonia level in your aquarium water. The kit contains enough material for 25 tests, including one 6-ml test reagent #1, one 10-ml test reagent #2, one 17-ml test reagent #3, a test vial, color scale, instructions and recommendations.