API Nitrite Test Fresh/Salt
Toxic nitrite is produced by nitrifying bacteria in the biological filter as it breaks down ammonia. Reads nitrite levels from 0 to 5ppm. For fresh & saltwater use.
Nitrite, a major cause of fish death, is produced in the aquarium by fish waste and overfeeding. Even low levels affect the red blood cells of fish, reducing their ability to carry oxygen, thus causing suffocation and even death.
| Test Range | 0 to 5 ppm |
|---|---|
| Usage | Freshwater and saltwater |
| Application | Monitoring nitrite levels in aquariums |
FAQ
Can this test kit be used in both freshwater and saltwater aquariums?
Yes, this test kit is suitable for both freshwater and saltwater aquariums.
What is the maximum nitrite level this test can detect?
The test kit can detect nitrite levels up to 5 ppm.
How often should I test my aquarium for nitrite?
It is recommended to test nitrite levels weekly or after any significant change in water conditions, such as adding new fish or performing water changes.

Julian Wilson –
Easy to use and gave accurate results. I tested my tank weekly and caught a spike in nitrite early. It helped me adjust my water changes and keep my fish healthy.
Pippa Vance –
Works well for both my freshwater and saltwater tanks. The instructions are clear and the color change is easy to read. A reliable tool for monitoring nitrite levels.
Andrea Mackenzie –
I’ve used this test for over a year and it’s consistently accurate. It’s become a regular part of my aquarium maintenance routine.