You can add the sequestering agent per the directions on the bottle. You can swim as sonn as your pool starts to hold chlorine. The ascorbic acid will not hurt you, you just want your water to be sanitized. Sometimes if you have a high calcium level, you water may get cloudy- it is just precipitating out of the water and will clear up with bleach. Sometimes it takes a lot of bleach until it eats up the ascorbic acid. Just make sure while adding bleach you don't take it to shock levels - let us know if you have any questions,

Marie