New to me pool with Heyward Aqua Rite 20 chlorine generating system w/Heyward GLX-Cell 5 attached. My pool timer is an Intermatic "old school" yellow dial type which runs my pump only. My understanding is that the Aqua Rite Chlorine system % setting tells the chlorine cell to run for the percentage of run time it is set for. Question is....the Aqua Rite system has no idea of how long I have the timer set for. No way can it operate as described. Am I correct on this or does the % knob control the output some other way? If it doesn't how do I control the amount of chlorine my system generates? Is it one size fits all, going to generate XXX amount of chlorine when running and that is that? Either turn the pool off or unplug the generator if I want to filter but not make chlorine? Thanks in advance for any comments/education!