Yes I am using testing strips till I get a Taylor K-2006 kit ... Free Chlorine is what it says. I thought it was a radical number but compared it to chart..?? I really appreciate your patients with me Just want to have safe place for kids to play without getting sick because I messed up with the chemicals.. My daughter has had a pool for several years and is still clueless on it.. she always shocks her pool and is dealing with cloudy pool but I don't think she would have to if she keeps the pH and chlorine in check. I have shared the pool solution site with her,