API test kit for Nitrite levels: Fast - Easy - Accurate Measures nitrite levels in both fresh & saltwater aquariums. Tests nitrite levels from 0 to 5 ppm. 180 tests per kit. Nitrite is produced in the aquarium by fish waste and uneaten fish food. Low levels of nitrite inhibit respiration and supress the immune system; high levels cause suffocation and fish death. This kit contains: liquid dropper bottle with child-resistant safety cap, easy-to-read instructions with information on how to test and how to correct unsafe water conditions, colour chart and glass tube with snap-tight cap.
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