Salifert Freshwater Nitrite NO2 Test Kit (60 Tests) - Salifert $9.95 Freshwater NO2 Test Kit (60 Tests)
API Nitrite Test Kit (180 Tests) - API $7.99 Nitrite is produced in the aquarium in the forms of fish waste, uneaten food, and by nitrifying bacteria in your aquarium’s natural cycle as it breaks down ammonia. Low levels of nitrite inhibit respiration and suppress the immune system, while...