According to the chlorine/CYA chart, if my CYA is at 40, then I need to shoot for min of 3, and a target of 5. If my CYA is 80, then I need a min of 6, and target of 9 for the chlorine. lets say pool "A" has a CYA of 40, and pool "B" has a CYA of 80, and they are both at the target levels of...