"Hach"

5-in-1 test strips are multi-parameter test strips test offering five water quality measurements on 1 strip.

Simple, low-cost color disc method is the most accurate visual test kit method

Utilizing the simple color disc method, this kit measures Nitrogen, Nitrate as NO3 and contains 50 tests.

Water ecology and limnology pertain to the physical, chemical and biological properties of fresh water, especially lakes, ponds and streams