NAT-1V-50 - Precision Test Strips- Test- Nitrate- Range- ppm- 0-250- Color Chart Concentrations- 0- 10- 25- 50- 100- 250- 500 - Precision Test Strips - Pack of 50

Precision Test Strips quickly test for low levels of nitrite and chlorine. -Fast Tests -Pool Test Strip Measures pH, free, and Total Chlorine -Aquarium Test Strip Measures pH and Chlorine Levels -Fifty Test Strips in One Package -Test Strips for Nitrite and Chlorine After immersing the strip in the solution to be measured, the concentration is measured by comparing the strips color to a color chart on the package. The Pool Test Strip is three tests in onepH, free, and total chlorine. The aquarium test strip simultaneously measures pH and chlorine levels. Each package includes 50 test strips in a resealable package.