Salifert Magnesium Profi-Test is a precision aquarium test kit specifically formulated to accurately measure magnesium levels in marine and reef aquariums. Designed to provide reliable and consistent testing results, it helps create the conditions required for proper calcium and alkalinity balance, supporting healthy coral growth, coralline algae development, and overall reef stability. By allowing hobbyists to monitor magnesium concentrations and adjust supplementation as needed, it helps maintain balanced water chemistry and supports long-term reef health. Easy to use and precisely formulated for consistent results, Salifert Magnesium Profi-Test helps maintain a stable marine environment where corals and other reef organisms can thrive.