Hi, can someone help me on why I can't get a breakthrough on my shock? I added 4 bags last night but no indication of free chlorine this morning. Earlier this week I put in 2 gallons of bleach, same outcome. I've checked with both strips and a 6-way test kit. The drop test would show some chlorine after setting a few minutes. The water is clear and odor-free, TA, pH, hardness all show within parameters. Thanks for any help.