Do I need to be at the site to perform the test?

Yes, you need to be at the site to perform the test. To ensure accurate results, take a sample of system water that is representative of the entire system. Let the water run for a few seconds before collecting the sample. Then, dip the test strip into the water for one second and remove it for analysis. For a detailed, step-by-step guide on how to use the Express Inhibitor Test, please refer to this guide