The Hanna HI-784-25 Marine Ammonia Reagents are specifically designed for use with the Hanna HI-784 Checker, ensuring accurate and reliable ammonia testing in marine environments. This package contains enough reagents for 25 tests, making it convenient for regular monitoring of ammonia levels in aquariums or marine research applications. The reagents are easy to use, providing a straightforward and efficient method for assessing ammonia concentrations, critical for maintaining healthy aquatic conditions.