Given I have a SWG which only makes chlorine when its on, what time of day should I be doing my full battery of tests? If I test at the end of a swim day, won't I get skewed results given bather load and sun? If I test at the beginning of the day, my SWG hasn't been running all night making any chlorine.
So - do most of you split the difference and test midway through the day? W/ people in the pool and whatever is going on?