Description The Low Level Peroxide test strip detects residual peroxides, for example, in drinking water, pools, and hot tubs where Hydrogen peroxide was used as a disinfectant. This test strip is calibrated at 0, 1, 3, 10, 50, and 100ppm, and give results in just seconds. Remove one test strip from the vial. Do not touch the test pad with your fingers. Dip the test strip into the solution being tested for 1 second. Remove and shake off any excess liquid. Compare the test pad to the colour chart after 10 seconds.