Nitrite 0-25 ppm, Nitrate 0-500 ppm Two Pad Test Strip [Vial of 50 Strips]

These test strips are great they give me a idea of the range. It took some getting use to because it goes off of color and the range can vary. But compared to my other tests its in the same range. But I can complain its a lot faster then pulling a kit out. I can easily dip and know if my level are going down quickly. I still used the hanna checker to get a better idea of the number but this is great for quick tests to make decisions. Very easy to use. The tests last a while and are cheaper then buying reagant refills for my testers. You should still be testing with other tests to get a better idea of the number but this is a huge time saver. and no mess or cleaning.

I love knowing what my levels are. And these seem to be spot on

I made two kinds of water to test this litmus paper, but it didn't seem to have a strong reaction. It may be useful for checking the safety of regular drinking water.

Did it's job

Seem to be fairly accurate readings because it tests similar to another strip I have that reads 8 items for my pool. I also like the fact that these strips don't expire until 2/2025.

Very easy to read

I used these while I was cycling my 75-gallon aquarium. They definitely change color and react to the nitrites and nitrates. I found them easier to read than strips I’ve used in the past. I bought another tube when I ran out

The magnitudinal difference between litmus value and actual chemical titration value can be as much as a 5X magnitude. Not really accurate enough for me to put my Tiger Oscar's existence at risk. However, a person can actually use the litmus tests to confirm a trending pattern, with a certain level of confidence. Beyond that, though, I would not trust the actual coefficients rendered as absolute values.