In the video, a person is holding a test strip over a pool of water. The test strip has several different colored sections, each representing a different chemical level. The person is comparing the colors on the strip to the corresponding levels on a chart. The chart is visible in the background, and the person is using it to interpret the results of the test. The water in the pool is a clear blue color, and the test strip is made of plastic with a clear window through which the colored sections are visible.