Anyone skeptical can see the proof here.
I ran out of Bleach last Wenesday and in the mix of things completely forgot to get more before our camping trip. So the pool sat with the pump on low from Wednesday until Monday night without anything added to it. Other than a few leaves in the bottom it's completely 100% crystal clear, I had a very faint reading of what I can image was .5 PPM FC or around there. Put a gallon of Bleach in to bring it just above 5 just in case. Checked the pool Tuesday morning and it was all back in line