The pool did get a little cloudy and smelled a little 'off', but no algae growth.
You might have gotten some ammonia if bacteria ate the CYA during the time the FC was 0.CC was pretty high initially, (can't remember exactly but I think 3-4ppm, when the highest I've ever had before is 0.5ppm) and FC was low at 0.5ppm.
So, you might have chlorine loss due to algae, Ascorbic acid breaking down, ammonia, sunlight etc.
Maintain SLAM to completion.
Run the pump 24/7 and the cell at 100%.