The JBL ProAquaTest NH4 Ammonium+ is a professional-grade water testing kit designed for aquariums and ponds. This comprehensive test kit allows aquarists to accurately measure ammonium/ammonia levels in their aquatic environments, helping maintain optimal water quality for fish health. Key features: • 50 tests per kit • Professional-grade accuracy • Easy-to-use liquid test system • Suitable for freshwater and marine aquariums • Clear color-coded results • Includes detailed instructions • Made by trusted aquarium brand JBL Regular testing of ammonium/ammonia levels is crucial for maintaining a healthy aquatic environment. High levels can be toxic to fish and other aquatic life. This test kit helps monitor these important parameters to prevent potential issues before they become problematic. The kit includes all necessary reagents and a color chart for accurate readings.