Hach 2745425 Nitrate and Nitrite Test Strip

For an inexpensive water testing method, these test strips do an excellent job. I am required to test the water once a week by the State and I have used this brand of strips satisfactorily for over 15 years. The readings I get from these strips is in alignment with the expensive lab tests the State does periodically with our water supply. CAUTION: Follow the instructions and NEVER touch the 2 testing pads with your fingers. Take a strip out of the container and close that container at that time.

I like them...

Testing septic effluent. If they are not close to expiring, the seem to work well.

Put an under sink nitrate filter at a house that had high nitrate issues. This provides an easy way to monitor the filters effectivness.

Nitrate pad turned an ugly brown within 4 months. I have been using test strips in a clinical setting and for my aquariums for years. This is the first time I have seen this problem. LaMotte strips are working for me a lot better for my fresh water aquariums. You have to remember to multiply the result you get with both Hach and Lamotte by 4.66 to get the correct reading in ppm.