The best time to add chlorine is in the evening when the sun is off the pool. By doing so, you have all the chlorine available to sanitize the water instead of having it lost to the sun. If you are not losing chlorine overnight, then you'll still have the same amount of cl during that day to work in your pool. If you do lose more than 1ppm of cl overnight, then you need to add bleach in the a.m. as well.
You don't have to have the cl between 8-10 to swim. When we tell people they want the cl below 10 to swim, those are people who have much lower cya levels than you do. With high cya, it is ok to swim at higher cl levels than with lower cya. So, with a cya of 97, it is fine to swim when the cl is 8-15 although when it is in the upper area of the range, you would probably want to wear old suits.
Hope your kit comes soon so we'll know for sure what your cya level is. Hope this helps.
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