Nitrite is produced by the beneficial bacteria in the aquarium and 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 any nitrite is detected, partial water changes should be carried out in order to reduce this. Check for the cause too, look for any uneaten food, decaying matter, or dead creatures.
• You can add some NT Labs Marine Live Filter Bacteria, Reeflowers Bacteria Feeder, or a Coral Reef NO₂ & NO₃ Remover Media.
• If you do record a nitrite level, then it is important to check other vital water quality parameters, especially pH and ammonia.

NT Labs Marine Lab 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 Marine Lab 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 marine, reef and brackish aquariums.