You probably won't have any chlorine left in the pool by this evening, because with no stabilizer the sun will consume it in a matter of a few hours or less. Until you have CYA in the pool, you're going to need to add bleach a few times a day to make sure you're keeping some chlorine in the pool. Go ahead and add your CYa, either in a sock hung in front of a return or slowly into the skimmer--but if you add it via skimmer, don't backwash the filter or retest for it for a week, because it takes up to 4-5 days to dissolve.

Janet