Waterlife Nitrate Test Kit NO3

What is nitrate?
Nitrite is oxidised into Nitrate (chemical symbol NO3) by nitrobacter, filtration bacteria.
Excessive levels of nitrate in an aquarium are responsible for poor fish colouration, lethargy, a failure to breed, and excessive algae growth.
In seawater, high nitrates are also responsible for stunted coral growth.
Ideal Parameters Seawater; 0-20ppm Freshwater; 0-50ppm Please refer to a reference book for specifics.
The Waterlife nitrate test gives a colour reading within 6 minutes, indicating nitrate levels.
Range covered 0 to 200 mg/l.