Toxic nitrite is produced by nitrifying bacteria in the biological filter as it breaks down ammonia. It can quickly kill your fish if not monitored, regular testing will enable you to know what's going on with your tank water.
-For fresh & salt water
-Reads nitrite levels for 0 to 5 ppm
-Approximately 180 tests. 1 Bottle Kit
-Easy to use dropper bottles
-Includes colour chart