Karen,

Your chlorine is not staying in the pool because it is being consumed by organics.....per my earlier post, you MUST get your Cl level to 15ppm and keep replenishing back up to 15ppm 'til your water clears. 12ppm won't get it. (well, if you've got all Summer.....)

I see no mention that you ever brought it to 15 at dusk and kept it there overnight. If you did, do it again. You're "tiptoeing" up to your problem instead of jumping on it with both feet.

It's fine to swim in. It's possible you might fade a swimsuit but nobody's gonna' rot.

Synopsis....YOU NEED CHLORINE TO 15PPM AT DUSK!!!. KEEP IT THERE! BE PREPARED TO PUT MORE IN BEFORE YOU GO TO BED......BACK UP TO 15PPM (Well, I wasn't really yelling but I want you to get my point. )