With the Sera No2 (nitrite) test it is easy to determine the No2 level of your water. Easy to use and instant results. Good for +- 75 tests.
Nitrite (NO2) is among the most toxic substances for fish in aquariums. It can enrich in the water in case of insufficient biological filtration.
The sera NO2-Test allows monitoring the nitrite level in fresh and marine water easily and reliably.
Drop test.
Description in the package.