Salifert Magnesium Test Kit ASJMAPT

The Salifert Magnesium Profi-Test measures magnesium in marine aquarium water. It is useful when following reef water chemistry alongside calcium and alkalinity, particularly before deciding whether a magnesium supplement is needed.

The test uses a colour-change titration rather than a digital meter. Accurate sample measurement, consistent reagent handling, and careful reading of the endpoint are important for comparable results. Follow the instructions supplied with the current kit, as reagent steps and interpretation should match that version.

Record results over time and repeat an unexpected reading before making a large dosing change. Keep the test equipment clean, avoid transferring reagent between bottles, and store the kit as directed. This magnesium test does not measure calcium, alkalinity, or general freshwater hardness; those require their own suitable methods.