This test kit is used for monitoring magnesium value in the aquarium, typically used in saltwater aquaria for maintaining a optimal level for invertebrates and ornamental algaes to thrive, but also used for freshwater to measure and maintain an optimum trace value of magnesium in the planted aquarium.
Copper is very toxic to fish and microorganisms.
Approximately 35 tests per kit. Also suitable for Saltwater. This test kit shows the iron level in aquariums and garden ponds. Iron is essential nutrient for aquatic plants. This test kit is for monitoring pH value, from acid pH 4.5 to alkaline pH 9.0.