Toxic nitrite is produced by nitrifying bacteria in the biological filter as it breaks down ammonia. this kit tests for harmful nitrite and measures levels from 0 to 5.0 ppm.

Product Details
Fill a clean test tube with 5 milliliters of water. add 5 drops of testing solution. replace cap and shake for 5 seconds. don't hold finger over open tube end as this may affect the reading. wait 5 minutes. read results against color chart in kit.
Instructions testing solution test tube with cap computer analyzed laminated color card.

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