The 145 chlorine paper test strips are primarily used for monitoring restaurant and kitchen sanitizing solutions where the target ppm level is between 100-150ppm. These test papers will not work well in pools.
Swimming pool chlorine levels are usually under 10ppm free chlorine. Our CHL-10, 0-10ppm chlorine test strip will work for this application.
In addition to low levels of chlorine, pool testing is complicated by other factors (ex. water quality, biological load issues, etc). For this reason pool strips are usually designed specifically for this application. Check out our 5-pad pool test strips.