Nutrafin’s Nitrate Test (0.0 - 110.0 mg/L) measures nitrate in fresh and saltwater aquariums. Nitrate should be tested on a regular basis as an indicator of pollution in the aquarium and to determine if a water change is necessary. Nitrate accumulates in aquariums over a period of time and is difficult to remove by conventional filtration means. Regular use of Nutrafin Waste Control and Nutrafin Cycle, along with regular water changes and the removal of organic waste and debris are the best preventative measures against nitrate accumulation. The kit provides up to 80 tests and includes: - One 17 mL (0.57 oz) Nitrate reagent #1 - One 10 mL (0.3 oz) Nitrate reagent #2 - One 10.5 mL (0.35 oz) Nitrate reagent #3 - One glass test tube with cap - One pipette - One lab base - One instruction booklet