Nitrite is produced by the beneficial bacteria in the aquarium and aquarium filters as they break down the harmful waste ammonia excreted by the fish. Nitrite can affect the health of fish but is not as toxic as ammonia, but it is still important to test regularly. The desired nitrite (NO₂) level is 0 mg/l.

• If the nitrite less than 0.25mg/l, test regularly as it may decrease as part of the filtering process. Removing any debris such as fish food or plant remains will help with this.
• Between 0.25mg/l and 0.5mg/l, add some NT Labs Aquarium Filter Start to reduce this.
• If the nitrite level is too high, (above 0.5mg/l), change 25% of the water volume for 1.0mg/l (ppm) nitrite and 50% for nitrite levels above this.
• If any level of nitrite is detected, NT Labs Ammonia Remover from the water.
• If you do record a nitrite level, then it is important to check other vital water quality parameters, especially pH and ammonia.

NT Labs Nitrite Test Kit will help you understand the importance of water quality. By having the correct parameters and good water quality, it will help your fish and plants live longer, healthier lives.

Highly accurate, the NT Labs Nitrite Test Kit contains liquid reagents which work by changing the colour of a water sample in relation to the concentration of a given substance. Simply compare the colour of the sample to the easy-to-read colour charts or count the number of drops it takes to alter the colour of the sample.

The tests are liquid drop tests from a calibrated dropper bottle, so all the drops are the same size. Just add your aquarium water to the test tube and count the drops needed. The back of the box details clear pictorial instructions so you can see what to do from the start. A set of colour coded stickers is provided to label both the test tubes and test tube lids, so you always conduct the same test in the same test tube avoiding contamination. Full instructions are included detailing optimum levels and suggestions for correction.

Suitable for tropical and coldwater aquariums. For brackish set ups, we recommend you use NT Labs Marine Labs Test Kits to obtain the most accurate results.