Nitrite is produced in the aquarium in the form of fish waste, uneaten food, and by nitrifying bacteria in your aquarium's natural cycle as they break down ammonia. Low levels of nitrite inhibit breathing and suppress the immune system, while high levels cause suffocation in fish.

The API® NITRITE TEST KIT quickly and accurately reads nitrite levels in your tank, testing parameters from 0 to 5 ppm.

Contains 180 tests and includes one test solution, easy-to-prepare instructions, glass test tube, and color chart.