API NITRITE TEST KIT 180-Test Freshwater and Saltwater Aquarium Test Kit

I just bought this as a replacement for my nitrite bottle in the master test kit - Id run out. Awesome that it comes with another test tube.

use it for my AP system

What 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.

Great

Kit says it contains color chart and glass test tube with tight cap but didn’t got none of that. Now i have to wait 2 days to test my water tested. Disappointed.

This 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

Great test kit and value for the money.

Kit is straightfoward to use. Theres a business-card size set of icons on the flip side of the color scale that guide you through usage, and its easy enough that you can figure it out solely from the pictures (there is also a verbose manual in the kit). I find the liquid readout easier to decipher than dip-strips. For most cases in an established aquarium, this test kit will provide the information that you need. Oftentimes you either have zero nitrite, or too much nitrite, and in the case of the latter, this kit is able to tell you whether you have more or less now than when you last tested. A word of caution for anyone doing fishless cycling of a tank: if you oversaturate this test reagent, it will read 0 ppm nitrite at the 5 minute time point. It takes around 100 or greater ppm nitrite to achieve this, and if youre oversaturating, you will see the reagent turn deep purple immediately, then slowly turn pale greenish-blue over time. If youre suspicious that the reading is oversaturated (this only applies if youre cycling a tank without fish, where you might incur substantial nitrite buildup but there are no fish to alert you by dying): just dilute the tank water 10 or 20-fold and test again to confirm your first result. Extending from this: if youre having a hard time measuring high amounts of nitrite because the shades of purple are too similar, just dilute your tank water a known amount, then read and multiply the result by the amount that you know you diluted.

Add 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.

Results are quick, testing is easy and reading the results is painless (with a light, otherwise the color of the water can be difficult to see)!