I'm at the end of week 3 of trying to clean my pool and I'm making slight progress. I can now see the third step, a major accomplishment. I've been following the guidelines on this site regarding shocking the pool. Based on the guidelines I'm keeping the FC at 16. I still have an overnight loss of about 2 and CC of about 1. Do I have to wait until I no longer need to shock before I can let anyone swim? Is it safe to swim with FC at shock levels?