Aqua One Nitrite Test Kit NO2

Aqua One Nitrite Test Kit

Nitrite is a toxic compound that can quickly build up in your aquarium or pond, especially in new systems or after filter disruptions. The Aqua One Nitrite Test Kit makes it simple to track nitrite levels and protect your fish from harm.

What Is Nitrite?

Nitrite (NO2) is produced when beneficial bacteria break down ammonia (also toxic) in your filter, it is the second part of the nitrogen cycle. Even low levels of nitrite are dangerous for fish, affecting their ability to absorb oxygen in their blood which can quickly lead to stress, disease and death.

Nitrite is measured in ‘ppm’ or ‘parts per million’

• Safe range: 0 ppm (parts per million)
• Dangerous levels: 0.25 ppm and above

The Importance of Testing Nitrite

Nitrite spikes are most common in:

• Newly established aquariums (during cycling)
• After cleaning or replacing filter media
• When adding lots of new fish at once
• After power outages or medication treatments

Regular testing helps you catch rising nitrite levels early so you can take action before fish are stressed or harmed.

✅ Key Features

• Fast, accurate nitrite testing for freshwater aquariums and ponds
• Testing range: 0–10 ppm
• Performs up to 60 tests per kit
• Easy-to-read colour chart included
• Essential for cycling new tanks and maintaining water quality