Sera Nitrate Test for the exact determination of the nitrate content (NO3) in fresh and marine water. The test is sufficient for approx. 60 tests. Nitrate is the final product of nitrogen-containing pollutants. Nitrate levels above 50 mg/l are not only harmful to the fish but also strongly promote algae growth. Thus, the nitrate level should be checked regularly by means of the Sera Nitrate Test. Sera Nitrate Test+ monitor the nitrate level in aquariums and garden ponds according to scientific standards+ the measured value provides information about organic pollution+ nitrate is an essential plant nutrient and one of the main causes of algae growth+ complete kit with vial, syringe, measuring spoon, and evaluation chart for precise water analysis+ with a readily understandable video tutorial for easy use+ for approx. 60 single tests