The API® NITRITE TEST KIT.
Nitrite is produced in the aquarium by fish waste and uneaten fish food. Low levels of nitrite inhibit respiration and suppress 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, color chart and test tube with snap-tight cap.
