No not alll. I had a chlorine system first. We transitioned to a salt system with no problems.
Drain some of your pool and refill it with fresh water.
No chlorine does not last long out in the oppen.
The only way to lower your cya level in your swimming pool is to partially drain your pool and fill with fresh water that will lower it or if you want to lower it to almost nothing completely drain your pool and start over but keep in mind chlorine tablets will raise your CYA level More information in the related link below.
You drain the water then plaster the walls from inside
simple drain a bit of it
You need to test the rest of your water chemistry if it is out of balance you will continue to be yellow. Condider putting only enough chlorine to have 2-3 PPM PH 7.2-7.6 Alkalinity 80-120 CYA around 80 ppm.Make sure your filter is kept clean.
Honestly, the best thing to do is drain the pool and start from scratch with the chlorine. Been there, done that.
You don't drain an inground swimming pool, unless you are trained to do so. Doing it alone or even with assistance is extremely dangerous. Save yourself some trouble and go contact a local and trained swimming pool cleaning service.
Once a week really