First time pool owner here. I have a weekend pool which I see only on Saturdays and Sundays. The rest of the week I am away. The pool guy comes over on Friday mornings to take care of chemicals. Here is my question: Since I have a guy come do the chemicals on Friday morning and I am not around Monday through Friday, should I drop a chlorine tab to maintain chlorine levels? i don't want the guy over-chlorinating on Friday to last for a week - that would make the water bad for my weekend fun. Any thoughts?