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J. Lowrie
> 3 dayWhat more is there to say? It tests aquariums for nitrite. Actually you do the testing and take a small water sample, add drops of reagent and match colors. If you find nitrite you need water changes. Pretty simple stuff.
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Beth S.
Greater than one weekThis item is great for testing aquarium water parameters. it functions great and will last a long time. a tip i have learned is to only use 2.5 ML of water compared to to recommended 5, it has doubled the life of the testing kit with the exact same results as using more product. highly recommend
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S.K.
> 3 dayGreen aqua = 0 ppm Blue warns and purples shout.
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R.M.F.
> 3 dayAdd the drops to the vial of aquarium water and wait 5 minutes, compare the color to the color chart on the provided card - not hard. API has been around a long time, so I will assume accuracy of the test results.
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Jade
> 3 dayWell it works. What else can I say?
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Melissa L
> 3 dayI always wanted to know how much nitrite is in my aquarium - so this takes the guesswork out. I was happy to see that I have around 0 ppm nitrite. Look up the nitrogen cycle for aquariums if you want to find out more about why this is important to know. I like saving money ordering these products through amazon, the pet stores are too pricey.
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Christopher J.
> 3 dayuse it for my AP system
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Theresa
Greater than one weekAnd I thank you too!
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Pearline Murphy
11-06-2025good accurate and very usefull
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Elizebeth
Greater than one weekThe box was crushed :/ so I was concerned that the glass test tube was broken, but thankfully it was fine!