NO2 is transformed from NH3 /NH4, and is the side product when bacteria
decompose protein. Even when NO2 level is only slightly above 0.1 mg/l,
it will poison fishes. NO2 usually causes the symptoms in fish such as,
bad appetite, fading body colors, insufficient oxygen uptaking,
vulnerable to fish diseases. So, NO2 level is a very important factor in water.
NO2 level should be maintained at 0 mg/l in aquariums.
Each kit includes a sample vial, and reagent for 35 tests.
1. When NO2 level is above 0.1 mg/l, it will be harmful for fish.
So, NO2 had better be maintained at 0 mg/l.
2. When NO2 is found in the aquarium, please have a water change and add
AZOO BIO-BACTERIA immediately.
Measurement Vial: 1
Color chart: 1