Even Leslie's Pool Supply can't help me. All of my values are perfect (ph, CYA, alkaline, calcium) except Chlorine. The free and the total both read 0 despite shocking the pool only a couple of hours ago. No matter what I do, I can't seem to get a chlorine reading. I have tablets in both skimmer baskets and I have shocked with two different kinds. But there is absolutely no chlorine in there despite the water being perfectly clear. Any ideas?