Michael, you needed to continue the slam until all three criteria were met, including .5 or less for CC. Allowing the FC to fall for 10 days means you probably spent several days below the recommended target level for your CYA. With a CYA of 60 your FC target is 7-9 ppm. Your last reported FC was 7.5, so you let it drop well below target range if you added nothing for 10 days.
You need to slam again, and then keep the FC within target range. The slam should be pretty quick since you are not dealing with a swamp. After the slam is completed you should be testing FC once a day so you will get a feel for how your pool reacts to weather changes and swimmer load. In a few weeks you will learn how often your pool needs additional chlorine and you won't have to test as often.
You need to slam again, and then keep the FC within target range. The slam should be pretty quick since you are not dealing with a swamp. After the slam is completed you should be testing FC once a day so you will get a feel for how your pool reacts to weather changes and swimmer load. In a few weeks you will learn how often your pool needs additional chlorine and you won't have to test as often.